{"id":13368,"date":"2020-03-24T08:10:49","date_gmt":"2020-03-24T15:10:49","guid":{"rendered":"http:\/\/www.preposterousuniverse.com\/blog\/?p=13368"},"modified":"2020-03-31T11:10:19","modified_gmt":"2020-03-31T18:10:19","slug":"the-biggest-ideas-in-the-universe-1-conservation","status":"publish","type":"post","link":"https:\/\/preposterousuniverse.com\/blog\/2020\/03\/24\/the-biggest-ideas-in-the-universe-1-conservation\/","title":{"rendered":"The Biggest Ideas in the Universe | 1. Conservation"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">We kick off our informal video series on <a href=\"https:\/\/www.preposterousuniverse.com\/blog\/category\/biggest-ideas-in-the-universe\/\">The Biggest Ideas in the Universe<\/a> with one of my favorites &#8212; <em><a href=\"https:\/\/www.youtube.com\/watch?v=AeNSMJtKGc0&amp;ab_channel=SeanCarroll\">Conservation<\/a><\/em>, as in &#8220;conservation of momentum,&#8221; &#8220;conservation of energy,&#8221; things like that. Readers of The Big Picture will recognize this as one of my favorite themes, and smile with familiarity as we mention some important names &#8212; Aristotle, Ibn Sina, Galileo, Laplace, and others.<\/p>\n\n\n<figure class=\"wp-block-embed-youtube wp-block-embed is-type-video is-provider-youtube wp-embed-aspect-4-3 wp-has-aspect-ratio\"><div class=\"lyte-wrapper\" title=\"The Biggest Ideas in the Universe | 1. Conservation\" style=\"width:640px;max-width:100%;margin:5px;\"><div class=\"lyMe\" id=\"WYL_AeNSMJtKGc0\" itemprop=\"video\" itemscope itemtype=\"https:\/\/schema.org\/VideoObject\"><div><meta itemprop=\"thumbnailUrl\" content=\"https:\/\/i.ytimg.com\/vi\/AeNSMJtKGc0\/hqdefault.jpg\" \/><meta itemprop=\"embedURL\" content=\"https:\/\/www.youtube.com\/embed\/AeNSMJtKGc0\" \/><meta itemprop=\"duration\" content=\"PT28M17S\" \/><meta itemprop=\"uploadDate\" content=\"2020-03-24T15:08:23Z\" \/><\/div><div id=\"lyte_AeNSMJtKGc0\" data-src=\"https:\/\/i.ytimg.com\/vi\/AeNSMJtKGc0\/hqdefault.jpg\" class=\"pL\"><div class=\"tC\"><div class=\"tT\" itemprop=\"name\">The Biggest Ideas in the Universe | 1. Conservation<\/div><\/div><div class=\"play\"><\/div><div class=\"ctrl\"><div class=\"Lctrl\"><\/div><div class=\"Rctrl\"><\/div><\/div><\/div><noscript><a href=\"https:\/\/youtu.be\/AeNSMJtKGc0\" rel=\"nofollow\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i.ytimg.com\/vi\/AeNSMJtKGc0\/0.jpg\" alt=\"The Biggest Ideas in the Universe | 1. Conservation\" width=\"640\" height=\"340\" \/><br \/>Watch this video on YouTube<\/a><\/noscript><meta itemprop=\"description\" content=\"[Correction: at 17:51 I say kinetic energy is a vector, I meant to say &quot;scalar.&quot; Kinetic energy has a size, but doesn&#039;t point in a direction.] The Biggest Ideas in the Universe is a series of videos where I talk informally about some of the fundamental concepts that help us understand our natural world. Exceedingly casual, not overly polished, and meant for absolutely everybody. In this installment - the very first idea we cover! - I talk about &quot;Conservation.&quot; The idea that a certain property, like momentum or energy or electric charge, stays the same over time. In my view, realizing that this is true - and the corollary, that the world naturally moves, rather than needing something external to keep it moving - represents the real transition between pre-modern and modern physics. My web page: http:\/\/www.preposterousuniverse.com\/ My YouTube channel: https:\/\/www.youtube.com\/c\/seancarroll Mindscape podcast: http:\/\/www.preposterousuniverse.com\/podcast The Biggest Ideas playlist: https:\/\/www.youtube.com\/watch?v=HI09kat_GeI&amp;list=PLrxfgDEc2NxZJcWcrxH3jyjUUrJlnoyzX&amp;ab_channel=SeanCarroll Blog posts for the series: http:\/\/www.preposterousuniverse.com\/blog\/category\/biggest-ideas-in-the-universe\/ Background image: https:\/\/www.jpl.nasa.gov\/missions\/voyager-1\/ #science #physics #ideas #universe #learning #cosmology #philosophy #math #conservation #momentum #energy #classicalmechanics\"><\/div><\/div><div class=\"lL\" style=\"max-width:100%;width:640px;margin:5px;\"><\/div><figcaption><\/figcaption><\/figure>\n\n\n<p class=\"wp-block-paragraph\">Remember that for the next couple of days you are encouraged to leave questions about what was discussed in the video, either here or directly at <a href=\"https:\/\/www.youtube.com\/watch?v=AeNSMJtKGc0&amp;ab_channel=SeanCarroll\">the YouTube page<\/a>. I will pick some of my favorites and make another video giving some answers. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Update: here&#8217;s the Q&amp;A.<\/p>\n\n\n<figure class=\"wp-block-embed-youtube wp-block-embed is-type-video is-provider-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"lyte-wrapper\" title=\"The Biggest Ideas in the Universe | Q&amp;amp;A 1 - Conservation\" style=\"width:640px;max-width:100%;margin:5px;\"><div class=\"lyMe\" id=\"WYL_liVg8LCU6i4\" itemprop=\"video\" itemscope itemtype=\"https:\/\/schema.org\/VideoObject\"><div><meta itemprop=\"thumbnailUrl\" content=\"https:\/\/i.ytimg.com\/vi\/liVg8LCU6i4\/hqdefault.jpg\" \/><meta itemprop=\"embedURL\" content=\"https:\/\/www.youtube.com\/embed\/liVg8LCU6i4\" \/><meta itemprop=\"duration\" content=\"PT40M41S\" \/><meta itemprop=\"uploadDate\" content=\"2020-03-29T15:24:20Z\" \/><\/div><div id=\"lyte_liVg8LCU6i4\" data-src=\"https:\/\/i.ytimg.com\/vi\/liVg8LCU6i4\/hqdefault.jpg\" class=\"pL\"><div class=\"tC\"><div class=\"tT\" itemprop=\"name\">The Biggest Ideas in the Universe | Q&amp;A 1 - Conservation<\/div><\/div><div class=\"play\"><\/div><div class=\"ctrl\"><div class=\"Lctrl\"><\/div><div class=\"Rctrl\"><\/div><\/div><\/div><noscript><a href=\"https:\/\/youtu.be\/liVg8LCU6i4\" rel=\"nofollow\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i.ytimg.com\/vi\/liVg8LCU6i4\/0.jpg\" alt=\"The Biggest Ideas in the Universe | Q&amp;amp;A 1 - Conservation\" width=\"640\" height=\"340\" \/><br \/>Watch this video on YouTube<\/a><\/noscript><meta itemprop=\"description\" content=\"Errata: at 7:23 I say &quot;equilateral&quot; triangle when I really just meant &quot;right&quot; triangle. (Also isosceles.) The Biggest Ideas in the Universe is a series of videos where I talk informally about some of the fundamental concepts that help us understand our natural world. Exceedingly casual, not overly polished, and meant for absolutely everybody. This is the first Q&amp;A video, following the idea &quot;Conservation&quot; discussed here: https:\/\/www.youtube.com\/watch?v=AeNSMJtKGc0&amp;ab_channel=SeanCarroll My web page: http:\/\/www.preposterousuniverse.com\/ My YouTube channel: https:\/\/www.youtube.com\/c\/seancarroll Mindscape podcast: http:\/\/www.preposterousuniverse.com\/podcast The Biggest Ideas playlist: https:\/\/www.youtube.com\/watch?v=HI09kat_GeI&amp;list=PLrxfgDEc2NxZJcWcrxH3jyjUUrJlnoyzX&amp;ab_channel=SeanCarroll Blog posts for the series: http:\/\/www.preposterousuniverse.com\/blog\/category\/biggest-ideas-in-the-universe\/ Background image: https:\/\/www.jpl.nasa.gov\/missions\/voyager-1\/ #science #physics #ideas #universe #learning #cosmology #philosophy #math\"><\/div><\/div><div class=\"lL\" style=\"max-width:100%;width:640px;margin:5px;\"><\/div><figcaption><\/figcaption><\/figure>","protected":false},"excerpt":{"rendered":"<p>We kick off our informal video series on The Biggest Ideas in the Universe with one of my favorites &#8212; Conservation, as in &#8220;conservation of momentum,&#8221; &#8220;conservation of energy,&#8221; things like that. Readers of The Big Picture will recognize this as one of my favorite themes, and smile with familiarity as we mention some important [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[137,28],"tags":[],"class_list":["post-13368","post","type-post","status-publish","format-standard","hentry","category-biggest-ideas-in-the-universe","category-science"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/posts\/13368","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/comments?post=13368"}],"version-history":[{"count":4,"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/posts\/13368\/revisions"}],"predecessor-version":[{"id":13381,"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/posts\/13368\/revisions\/13381"}],"wp:attachment":[{"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/media?parent=13368"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/categories?post=13368"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/tags?post=13368"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}