[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:23.60,0:00:31.36,Default,,0000,0000,0000,,Near a black hole space and time do some very strange things because the black holes are probably the most
Dialogue: 0,0:00:31.36,0:00:39.28,Default,,0000,0000,0000,,violent places we know of in the universe. This river provides a beautiful analogy of what happens
Dialogue: 0,0:00:39.28,0:00:42.76,Default,,0000,0000,0000,,to space and time as you get closer and closer to the black hole.
Dialogue: 0,0:00:47.84,0:00:51.08,Default,,0000,0000,0000,,Now upstream the water is flowing pretty slowly.
Dialogue: 0,0:00:51.08,0:00:54.44,Default,,0000,0000,0000,,Let's imagine that it is flowing at three kilometers per hour
Dialogue: 0,0:00:54.44,0:01:00.52,Default,,0000,0000,0000,,and I can swim at 4, so I can swim faster than the flow and can easily escape
Dialogue: 0,0:01:16.00,0:01:19.52,Default,,0000,0000,0000,,But as you go further, further down the stream towards
Dialogue: 0,0:01:19.52,0:01:23.52,Default,,0000,0000,0000,,the waterfall in the distance, the river flows faster and faster.
Dialogue: 0,0:01:43.28,0:01:48.64,Default,,0000,0000,0000,,Imagine that I decided to jump in the river just there at the edge of the falls
Dialogue: 0,0:01:48.64,0:01:52.64,Default,,0000,0000,0000,,The water is flowing far faster than I could swim.
Dialogue: 0,0:01:52.64,0:01:55.72,Default,,0000,0000,0000,,So, no matter what I did, no matter how hard I tried
Dialogue: 0,0:01:55.72,0:01:59.56,Default,,0000,0000,0000,,I would not be able to swim back upstream
Dialogue: 0,0:01:59.56,0:02:04.48,Default,,0000,0000,0000,,I would be carried inextricably towards the edge and I would vanish over the falls
Dialogue: 0,0:02:20.76,0:02:23.48,Default,,0000,0000,0000,,Well, it's the same close to the black hole,
Dialogue: 0,0:02:23.48,0:02:28.52,Default,,0000,0000,0000,,because the space flows faster, faster and faster
Dialogue: 0,0:02:28.52,0:02:30.00,Default,,0000,0000,0000,,towards the black hole.
Dialogue: 0,0:02:30.00,0:02:36.16,Default,,0000,0000,0000,,Literally, this stuff, my space that I am in, flowing over the edge into the black hole.
Dialogue: 0,0:02:36.16,0:02:42.92,Default,,0000,0000,0000,,And then, at a very special point, called the event horizon, the space is flowing
Dialogue: 0,0:02:42.92,0:02:45.96,Default,,0000,0000,0000,,at the speed of light into the black hole.
Dialogue: 0,0:02:50.80,0:02:57.28,Default,,0000,0000,0000,,Light itself, travelling at 300.000km per second is not going fast enough to escape the flow
Dialogue: 0,0:02:57.28,0:03:01.28,Default,,0000,0000,0000,,and light itself will plunge into the black hole.
Dialogue: 0,0:03:16.16,0:03:22.84,Default,,0000,0000,0000,,Well, as you fall into the black hole, across the event horizon, then if you were going feet first, your feet will be
Dialogue: 0,0:03:22.84,0:03:27.16,Default,,0000,0000,0000,,accelerating faster than your head, so you'll be stretched
Dialogue: 0,0:03:27.16,0:03:31.27,Default,,0000,0000,0000,,and you'll be quite literally spaghettified.
Dialogue: 0,0:03:37.76,0:03:39.52,Default,,0000,0000,0000,,Now as you get right into the center,
Dialogue: 0,0:03:39.52,0:03:43.77,Default,,0000,0000,0000,,Then our understanding of the laws of physics breaks down.
Dialogue: 0,0:03:43.79,0:03:48.12,Default,,0000,0000,0000,,Our best theory of space and time, Einstein's theory of general relativity
Dialogue: 0,0:03:48.12,0:03:51.80,Default,,0000,0000,0000,,says that space and time become infinitely curved, that
Dialogue: 0,0:03:51.80,0:03:55.55,Default,,0000,0000,0000,,the center of the hole becomes infinitely dense
Dialogue: 0,0:03:56.47,0:03:59.92,Default,,0000,0000,0000,,That place is called the singularity and it is the place
Dialogue: 0,0:03:59.92,0:04:05.16,Default,,0000,0000,0000,,where our understanding of the Universe stops.