{"id":63378,"date":"2026-05-14T04:37:26","date_gmt":"2026-05-13T19:37:26","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=63378"},"modified":"2026-05-14T04:37:26","modified_gmt":"2026-05-13T19:37:26","slug":"discovered-a-headless-creature-at-the-aquarium-the-shocking-truth-and-the-physics-mysteries-spreading-across-the-waters-surface","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=63378&lang=en","title":{"rendered":"Discovered a \u201cHeadless Creature\u201d at the Aquarium!? The Shocking Truth and the Physics Mysteries Spreading Across the Water\u2019s Surface"},"content":{"rendered":"<p style=\"text-align: center;\"><span style=\"color: #339966;\"><strong>I\u2019m Ken Kuwako, the Science Trainer. Every day is an experiment.<\/strong><\/span><\/p>\n<p>Here\u2019s a quick challenge for you. Take a look at this video. A strange black creature is moving around\u2026 but what do you think it is?<\/p>\n<p><iframe loading=\"lazy\" title=\"\u9996\u306e\u306a\u3044\u751f\u7269!?\u3053\u308c\u306a\u30fc\u3093\u3060\uff01\u3010\u5c48\u6298\u306e\u6cd5\u5247\u3011\" width=\"1140\" height=\"641\" src=\"https:\/\/www.youtube.com\/embed\/j85OScvoJVk?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p style=\"text-align: center;\">Wait\u2026 WHAT is that?!<\/p>\n<p> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-35494 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/04\/4f085922adaad96a51b3f6d0292677eb.jpg\" alt=\"\" width=\"371\" height=\"208\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/04\/4f085922adaad96a51b3f6d0292677eb.jpg 1174w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/04\/4f085922adaad96a51b3f6d0292677eb-300x168.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/04\/4f085922adaad96a51b3f6d0292677eb-1024x574.jpg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/04\/4f085922adaad96a51b3f6d0292677eb-768x430.jpg 768w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/04\/4f085922adaad96a51b3f6d0292677eb-320x180.jpg 320w\" sizes=\"auto, (max-width: 371px) 100vw, 371px\" \/> <\/p>\n<p style=\"text-align: center;\">A headless animal is swimming around.<\/p>\n<p>Did you figure it out?<\/p>\n<p>It\u2019s actually a penguin!<\/p>\n<p>This footage was filmed at the penguin tank inside the Sumida Aquarium, right next to Tokyo Skytree. The camera is pointed upward from underneath the tank, giving you the same perspective as if you were underwater looking up at the penguins.<\/p>\n<p>And somehow, from this angle, their heads seem to disappear completely. Pretty bizarre, right?<\/p>\n<h3>Finding Physics at the Aquarium<\/h3>\n<p>The other day, I visited <a href=\"http:\/\/www.sumida-aquarium.com\/\">Sumida Aquarium<\/a>. One of its biggest attractions is the huge indoor penguin tank. From the second floor, you can look down into the water from above.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" title=\"20130804131400\" src=\"http:\/\/cdn-ak.f.st-hatena.com\/images\/fotolife\/k\/kkuwako\/20130804\/20130804131400.jpg\" alt=\"20130804131400\" width=\"473\" height=\"355\" \/><\/p>\n<p style=\"text-align: center;\">From the upper floor, you can clearly see the blue bottom of the tank.<\/p>\n<p>But when you head down to the first floor, you can look up at the penguins from below \u2014 almost like seeing the world through a penguin\u2019s eyes. That\u2019s the perspective shown in the opening video.<\/p>\n<p>And while looking up through the water, you\u2019ll notice something even stranger.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" title=\"20130804133003\" src=\"http:\/\/cdn-ak.f.st-hatena.com\/images\/fotolife\/k\/kkuwako\/20130804\/20130804133003.jpg\" alt=\"20130804133003\" width=\"477\" height=\"359\" \/><\/p>\n<p>When you look upward through the tank, the view splits into two completely different regions:<\/p>\n<p>One area lets you clearly see the outside world above the water.<\/p>\n<p>The other area turns completely blue, blocking the outside view entirely.<\/p>\n<p>It almost looks like a circular \u201cwindow\u201d floating in the water.<\/p>\n<p>I saw the exact same effect at the Hakone-en Aquarium too. Check out this video as well:<\/p>\n<p><iframe loading=\"lazy\" title=\"\u30a2\u30b6\u30e9\u30b7\u306f\u4e38\u3044\u7a93\u304b\u3089\u30dc\u30af\u9054\u3092\u898b\u3066\u3044\u308b\u3010\u79d1\u5b66\u306e\u30cd\u30bf\u3011\" width=\"1140\" height=\"641\" src=\"https:\/\/www.youtube.com\/embed\/zcKa0wBtguU?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>The blue area you see is actually the blue-painted concrete at the bottom of the tank.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" style=\"font-size: 13px;\" title=\"20130812161531\" src=\"http:\/\/cdn-ak.f.st-hatena.com\/images\/fotolife\/k\/kkuwako\/20130812\/20130812161531.jpg\" alt=\"20130812161531\" width=\"450\" height=\"340\" \/><\/p>\n<p>So why does the outside world appear as if it\u2019s been cut out into a perfect circle?<\/p>\n<p>What exactly creates that mysterious boundary?<\/p>\n<h3>The Answer: Total Internal Reflection<\/h3>\n<p>The secret lies in refraction and total internal reflection.<\/p>\n<p>If you slightly raise your line of sight and look diagonally upward through the water, you can see lights on the ceiling reflected into view. Light travels in reversible paths, so by tracing the path backward, you can figure out where the light originally came from.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-29908 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2017\/12\/78ea3a614c2c1e0a39d3f9ac9686ad3f.png\" alt=\"\" width=\"563\" height=\"372\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2017\/12\/78ea3a614c2c1e0a39d3f9ac9686ad3f.png 800w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2017\/12\/78ea3a614c2c1e0a39d3f9ac9686ad3f-300x198.png 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2017\/12\/78ea3a614c2c1e0a39d3f9ac9686ad3f-768x508.png 768w\" sizes=\"auto, (max-width: 563px) 100vw, 563px\" \/><\/p>\n<p>Now slowly lower your viewing angle.<\/p>\n<p>At one precise angle, the scene suddenly changes from \u201cI can see the outside world\u201d to \u201cI only see the blue bottom of the tank.\u201d<\/p>\n<p>That special angle is called the critical angle.<\/p>\n<p>Using Snell\u2019s Law from high school physics, we can calculate it. If the refractive index of air is about 1 and water is about 1.33, the critical angle comes out to roughly 48\u00b0.<\/p>\n<p>High school students: try calculating it yourself using arcsin on a scientific calculator!<\/p>\n<p>In other words:<\/p>\n<p>When looking from underwater at angles shallower than 48\u00b0 (closer to the water\u2019s surface), you can see the outside world.<\/p>\n<p>But at steeper angles (closer to straight upward), total internal reflection occurs. Instead of seeing outside, the water acts like a mirror, and you only see reflections and the blue tank bottom.<\/p>\n<p>In a real aquarium, the glass of the tank also affects the refraction slightly, so the actual angle becomes a little larger than 48\u00b0.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-29915 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2014\/02\/a620d08c8dc0ada4027a3b02da972882.png\" alt=\"\" width=\"526\" height=\"364\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2014\/02\/a620d08c8dc0ada4027a3b02da972882.png 800w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2014\/02\/a620d08c8dc0ada4027a3b02da972882-300x208.png 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2014\/02\/a620d08c8dc0ada4027a3b02da972882-768x532.png 768w\" sizes=\"auto, (max-width: 526px) 100vw, 526px\" \/><\/p>\n<p>Because this boundary appears at the same angle in every direction, it forms a perfect circular \u201cwindow\u201d underwater.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" title=\"20130812161531\" src=\"http:\/\/cdn-ak.f.st-hatena.com\/images\/fotolife\/k\/kkuwako\/20130812\/20130812161531.jpg\" alt=\"20130812161531\" width=\"450\" height=\"340\" \/> <\/p>\n<h3>Are the Penguins Looking Back at Us Through the \u201cWindow\u201d?<\/h3>\n<p>Take another look at the tank from above.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" title=\"20130804131400\" src=\"http:\/\/cdn-ak.f.st-hatena.com\/images\/fotolife\/k\/kkuwako\/20130804\/20130804131400.jpg\" alt=\"20130804131400\" width=\"450\" height=\"338\" \/><\/p>\n<p>From above, the entire tank bottom looks blue.<\/p>\n<p>But from underwater, the outside world is visible only through that circular window.<\/p>\n<p>Which means the penguins themselves may actually be peeking up at us through the same underwater \u201cwindow.\u201d<\/p>\n<p>Kind of feels like you might make eye contact with one, doesn\u2019t it?<\/p>\n<p>Next time you visit an aquarium, try looking up through the water from below. You\u2019ll discover that the \u201crefraction of light\u201d from physics textbooks isn\u2019t just theory \u2014 it\u2019s a real phenomenon unfolding right in front of your eyes.<\/p>\n<div class=\"g-ytsubscribe\" data-channelid=\"UCBoF1yPvFnXnSJ_Xe5AmXcw\" data-layout=\"full\" data-count=\"default\"><\/div>\n<h3>Contact &#038; Requests<\/h3>\n<p>Bringing the wonder of science closer to everyday life!<\/p>\n<p>This site is packed with fun science experiments you can try at home, along with easy-to-understand explanations and tips. Feel free to explore around!<\/p>\n<p>\u30fbThe \u201cScience Notebook\u201d articles are now available as a book. Learn more <a href=\"https:\/\/amzn.to\/42PMCEL\">here<\/a><br \/>\n\u30fbAbout Ken Kuwako, the creator of this site: <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=37\">here<\/a><br \/>\n\u30fbFor writing requests, lectures, science workshops, TV supervision, appearances, and more: <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">here<\/a><br \/>\n<span class=\"s2\">\u30fbFollow updates for new articles on <a href=\"https:\/\/x.com\/kuwako\">X<\/a>!<\/span><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.youtube.com\/user\/kkuwako\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-35048\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/03\/3d9640dad7bc5538e76f92da1966ee19.jpg\" alt=\"\" width=\"30\" height=\"21\" \/><\/a><a href=\"https:\/\/www.youtube.com\/user\/kkuwako?sub_confirmation=1\">Science Note Channel<\/a> features experiment videos too!<\/p>\n<h3>\uff15\u6708\u306e\u30a4\u30c1\u30aa\u30b7\u5b9f\u9a13\uff01<\/h3>\r\n<p>\u30ad\u30fc\u30f3\u3068\u51b7\u3048\u308b\u30c9\u30e9\u30a4\u30a2\u30a4\u30b9\uff01\u6c17\u6e29\u304c\u4e0a\u304c\u3063\u3066\u304f\u308b\u3053\u306e\u6642\u671f\u30fb\u30c9\u30e9\u30a4\u30a2\u30a4\u30b9\u3092\u4f7f\u3063\u305f\u6607\u83ef\u30fb\u51dd\u7d50\u30fb\u7b49\u901f\u5ea6\u76f4\u7dda\u904b\u52d5\u306e\u5b9f\u9a13\u306f\u3044\u304b\u304c\uff1f<\/p>\r\n<p><img class=\"alignnone wp-image-39516 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/03\/0618612becc032a60bdda50090ccccbe.jpg\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/03\/0618612becc032a60bdda50090ccccbe.jpg 1406w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/03\/0618612becc032a60bdda50090ccccbe-300x168.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/03\/0618612becc032a60bdda50090ccccbe-1024x572.jpg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/03\/0618612becc032a60bdda50090ccccbe-768x429.jpg 768w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/03\/0618612becc032a60bdda50090ccccbe-320x180.jpg 320w\" alt=\"\" width=\"453\" height=\"253\" \/><\/p>\r\n<p style=\"text-align: center;\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=39513\">\u6db2\u4f53\u30bc\u30ed\uff01\u30c9\u30e9\u30a4\u30a2\u30a4\u30b9\u304c\u6d88\u3048\u308b\u307e\u3067\u306e\uff13\u6642\u9593\u3092\u79d1\u5b66\u3059\u308b\uff08\u6607\u83ef\u30fb\u51dd\u7d50\u30fb\u7b49\u901f\u5ea6\u76f4\u7dda\u904b\u52d5\uff09<\/a><\/p>\r\n<h3 style=\"text-align: left;\"><span style=\"font-size: medium;\"><b><strong>\u30c6\u30ec\u30d3\u756a\u7d44\u76e3\u4fee\u30fb\u30a4\u30d9\u30f3\u30c8\u7b49\u306e\u304a\u77e5\u3089\u305b<\/strong><\/b><\/span><\/h3>\r\n<ul>\r\n<li>4\u670830\u65e5\uff08\u6728\uff09\u300cTHE\u7a81\u7834\u30d5\u30a1\u30a4\u30eb\u300d\uff08\u65e5\u672c\u30c6\u30ec\u30d3\uff09\u306e<a href=\"https:\/\/phys-edu.net\/wp\/?p=62906\">\u79d1\u5b66\u76e3\u4fee\u3092\u62c5\u5f53\u3057\u307e\u3057\u305f<\/a>\u3002<\/li>\r\n<li>5\u67088\u65e5\uff08\u91d1\uff09<a href=\"https:\/\/phys-edu.net\/wp\/?p=62629\">\u7406\u79d1\u6559\u80b2\u30cb\u30e5\u30fc\u30b9<\/a>\u3092\u62c5\u5f53\u3057\u307e\u3057\u305f\u3002<\/li>\r\n<li>6\u670814\u65e5\uff08\u65e5\uff09\u3000\u5343\u8449\u5927\u5b66\u30a4\u30f3\u30b9\u30bf\u30ec\u30fc\u30b7\u30e7\u30f3\u300c\u63a2\u7a76\u300d\u306b\u3066\u8b1b\u5e2b\u3092\u52d9\u3081\u307e\u3059<\/li>\r\n<li>6\u670826\u65e5\uff08\u91d1\uff09\u3000\u5343\u8449\u5927\u5b66\u306e\u516c\u958b\u7814\u7a76\u4f1a\uff08\u4e2d\u5b66\u7406\u79d1\u306b\u3064\u3044\u3066\u6388\u696d\u516c\u958b\u4e88\u5b9a\uff09<\/li>\r\n<li>7\u670818\u65e5\uff08\u571f\uff09\u3000<a href=\"https:\/\/phys-edu.net\/wp\/?p=60018\">\u6559\u54e1\u5411\u3051\u5b9f\u9a13\u8b1b\u7fd2\u4f1a\u300c\u30ca\u30ea\u30ab\u30ab\u30b5\u30a4\u30a8\u30f3\u30b9\u30a2\u30ab\u30c7\u30df\u30fc\u300d\u306e\u8b1b\u5e2b\u3092\u3057\u307e\u3059<\/a>\u3002\u304a\u4f1a\u3044\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\r\n<\/ul>\r\n<h3><b>\u66f8\u7c4d<strong>\u306e\u304a\u77e5\u3089\u305b<\/strong><\/b><\/h3>\r\n<ul>\r\n<li>\u300e\u5927\u4eba\u306e\u305f\u3081\u306e\u9ad8\u6821\u7269\u7406\u5fa9\u7fd2\u5e33\u300f\uff08\u8b1b\u8ac7\u793e\uff09\u2026\u4e00\u822c\u5411\u3051\u306b\u65e5\u5e38\u306e\u7269\u7406\u306b\u3064\u3044\u3066\u516c\u5f0f\u3092\u5143\u306b\u7d10\u89e3\u304d\u307e\u3057\u305f\u3002<a href=\"https:\/\/phys-edu.net\/wp\/?p=1827\">\u7279\u8a2d\u30b5\u30a4\u30c8<\/a>\u3067\u306f\u5b9f\u9a13\u3092\u591a\u6570\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002<strong>\u203b\u5897\u5237\u304c\u304b\u304b\u308a\uff16\u5237\u3068\u306a\u308a\u307e\u3057\u305f\uff082026\/02\/01\uff09<br \/><img class=\"alignnone wp-image-10940 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0-300x262.jpg\" sizes=\"(max-width: 220px) 100vw, 220px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0-300x262.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0.jpg 311w\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2014-07-05 0.43.51\" width=\"220\" height=\"192\" \/><br \/><\/strong><\/li>\r\n<li>\u300e\u304d\u3081\u308b!\u5171\u901a\u30c6\u30b9\u30c8 \u7269\u7406\u57fa\u790e \u6539\u8a02\u7248\u300f\uff08\u5b66\u7814\uff09\u2026\u3000\u9ad8\u6821\u7269\u7406\u306e\u53c2\u8003\u66f8\u3067\u3059\u3002\u30a4\u30e9\u30b9\u30c8\u3092\u591a\u304f\u3057\u3066\u30a4\u30e1\u30fc\u30b8\u304c\u6301\u3066\u308b\u3088\u3046\u306b\u63cf\u304d\u307e\u3057\u305f\u3002\u6388\u696d\u306b\u3064\u3044\u3066\u3044\u3051\u306a\u3044\u3001\u7269\u7406\u304c\u82e6\u624b\u3001\u305d\u3093\u306a\u751f\u5f92\u306b\u304a\u3059\u3059\u3081\u3067\u3059\u3002<a href=\"https:\/\/phys-edu.net\/wp\/?p=45322\">\u7279\u8a2d\u30b5\u30a4\u30c8<\/a>\u306f\u3053\u3061\u3089\u3002<br \/><img class=\"alignnone wp-image-45718 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c.jpg\" sizes=\"(max-width: 184px) 100vw, 184px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c.jpg 756w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c-300x269.jpg 300w\" alt=\"\" width=\"184\" height=\"165\" \/><\/li>\r\n<\/ul>\r\n<h3><span style=\"text-align: center;\">\u5404\u7a2eSNS\uff08\u66f4\u65b0\u60c5\u5831\u3092\u304a\u5c4a\u3051\uff01\uff09<\/span><\/h3>\r\n<p style=\"text-align: center;\"><a style=\"text-align: center;\" href=\"https:\/\/twitter.com\/kuwako\">X(Twitter)<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.instagram.com\/science_seeds\/\">instagram<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.facebook.com\/kuwakolab\/\">Facebook<\/a>\uff08\u65e5\u672c\u8a9e\uff09<\/p>\r\n<p style=\"text-align: center;\"><a style=\"text-align: center;\" href=\"https:\/\/bsky.app\/profile\/kagakunoneta.bsky.social\">BlueSky<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.threads.net\/@science_seeds?hl=ja\">Threads<\/a>\uff08\u82f1\u8a9e\uff09<\/p>\r\n<h3 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href=\"http:\/\/phys-edu.net\/wp\/?page_id=37\">About<\/a>\u00a0\u2026\u300c\u79d1\u5b66\u306e\u30cd\u30bf\u5e33\u300d\u306e\u30b3\u30f3\u30bb\u30d7\u30c8\u3084\u3001\u904b\u55b6\u8005\u3067\u3042\u308b\u6851\u5b50\u7814\u306e\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb\u30fb\u60f3\u3044\u3092\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002<\/li>\r\n<li><a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">\u304a\u554f\u3044\u5408\u308f\u305b<\/a> \u2026\u5b9f\u9a13\u6559\u5ba4\u306e\u3054\u4f9d\u983c\u3001\u57f7\u7b46\u30fb\u8b1b\u6f14\u306e\u76f8\u8ac7\u3001\u79d1\u5b66\u76e3\u4fee\u7b49\u306f\u3053\u3061\u3089\u306e\u30d5\u30a9\u30fc\u30e0\u304b\u3089\u304a\u5bc4\u305b\u304f\u3060\u3055\u3044\u3002<\/li>\r\n<\/ul>\r\n","protected":false},"excerpt":{"rendered":"<p>I\u2019m Ken Kuwako, the Science Trainer. Every day is an experiment. Here\u2019s a quick challenge for you. Take a look [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":35494,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","sns_share_botton_hide":"","vkExUnit_sns_title":"","vkexunit_cta_each_option":"","_lightning_design_setting":{"layout":"default"},"footnotes":""},"categories":[781],"tags":[],"class_list":["post-63378","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science-en"],"jetpack_featured_media_url":"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/04\/4f085922adaad96a51b3f6d0292677eb.jpg","jetpack-related-posts":[{"id":63077,"url":"https:\/\/phys-edu.net\/wp\/?p=63077&lang=en","url_meta":{"origin":63378,"position":0},"title":"The 48\u00b0 Magic: Diving into the &#8220;Other World&#8221; Through a Penguin\u2019s Eyes.","author":"\u6851\u5b50 \u7814","date":"2026\u5e745\u67085\u65e5","format":false,"excerpt":"This is Kuwako Ken, your science trainer. Every da\u2026","rel":"","context":"Science","block_context":{"text":"Science","link":"https:\/\/phys-edu.net\/wp\/?cat=781&lang=en"},"img":{"alt_text":"20130804131400","src":"https:\/\/i0.wp.com\/cdn-ak.f.st-hatena.com\/images\/fotolife\/k\/kkuwako\/20130804\/20130804131400.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":51883,"url":"https:\/\/phys-edu.net\/wp\/?p=51883&lang=en","url_meta":{"origin":63378,"position":1},"title":"Uncovering the Physics of Mermaid Lagoon: A DisneySea Adventure","author":"\u6851\u5b50 \u7814","date":"2025\u5e749\u670810\u65e5","format":false,"excerpt":"I'm Ken Kuwako, your Science Trainer. Every day is\u2026","rel":"","context":"Science","block_context":{"text":"Science","link":"https:\/\/phys-edu.net\/wp\/?cat=781&lang=en"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/10\/70422edfa369d782b1384f5db6e22b6b.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/10\/70422edfa369d782b1384f5db6e22b6b.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/10\/70422edfa369d782b1384f5db6e22b6b.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":55754,"url":"https:\/\/phys-edu.net\/wp\/?p=55754&lang=en","url_meta":{"origin":63378,"position":2},"title":"The Alligator&#8217;s Secret Mirror: How Total Internal Reflection Connects Aquariums and the Internet","author":"\u6851\u5b50 \u7814","date":"2025\u5e7411\u670811\u65e5","format":false,"excerpt":"I'm Ken Kuwako, your Science Trainer. 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Every day is\u2026","rel":"","context":"Science","block_context":{"text":"Science","link":"https:\/\/phys-edu.net\/wp\/?cat=781&lang=en"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2025-10-12-5.33.32.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2025-10-12-5.33.32.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2025-10-12-5.33.32.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2025-10-12-5.33.32.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2025-10-12-5.33.32.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=\/wp\/v2\/posts\/63378","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=63378"}],"version-history":[{"count":1,"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=\/wp\/v2\/posts\/63378\/revisions"}],"predecessor-version":[{"id":63379,"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=\/wp\/v2\/posts\/63378\/revisions\/63379"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=\/wp\/v2\/media\/35494"}],"wp:attachment":[{"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=63378"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=63378"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=63378"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}