{"version": "1.0", "type": "rich", "title": "A 50-kilogram anvil floats perfectly on the surface of mercury, because the density of the steel from which it is made is almost...", "author_name": "kontextmaschine", "author_url": "https://kontextmaschine.com", "provider_name": "kontextmaschine", "provider_url": "https://kontextmaschine.com", "url": "https://kontextmaschine.com/post/700331090301304832/", "html": "<p><a class=\"tumblr_blog\" href=\"https://viktor-sbor.tumblr.com/post/700324266542039040/a-50-kilogram-anvil-floats-perfectly-on-the\" target=\"_blank\">viktor-sbor</a>:</p><blockquote><figure class=\"tmblr-full\" data-orig-height=\"382\" data-orig-width=\"678\" data-npf='{\"type\":\"video\",\"provider\":\"tumblr\",\"url\":\"/media/tumblr_rkzbrkUdER1sstv8d_b50d55e46602.mp4\",\"media\":{\"url\":\"/media/tumblr_rkzbrkUdER1sstv8d_b50d55e46602.mp4\",\"type\":\"video/mp4\",\"width\":678,\"height\":382},\"poster\":[{\"url\":\"https://64.media.tumblr.com/tumblr_rkzbrkUdER1sstv8d_frame1.jpg\",\"type\":\"image/jpeg\",\"width\":678,\"height\":382}],\"filmstrip\":{\"url\":\"https://64.media.tumblr.com/previews/tumblr_rkzbrkUdER1sstv8d_filmstrip.jpg\",\"type\":\"image/jpeg\",\"width\":2000,\"height\":112}}'><video controls=\"controls\" autoplay=\"autoplay\" playsinline=\"playsinline\" muted=\"muted\" poster=\"https://64.media.tumblr.com/tumblr_rkzbrkUdER1sstv8d_frame1.jpg\"><source src=\"/media/tumblr_rkzbrkUdER1sstv8d_b50d55e46602.mp4\" type=\"video/mp4\"></source></video></figure><p>A 50-kilogram anvil floats perfectly on the surface of mercury, because the density of the steel from which it is made is almost half the density of mercury.</p></blockquote>"}