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But now, increasing amounts are free to escape
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Nova

But now, increasing amountsare free to escape. ♪ ♪ Over just a few million years, oxygen...

Nova • S50E11 • 1974
But now, increasing amountsare free to escape. ♪ ♪ Over just a few million years, oxygen floodsinto the atmosphere. ♪ ♪

Full Transcript

00:00:01.000 --> 00:00:04.000
But now increasing amounts are free to escape
00:00:04.000 --> 00:00:09.000
water bubbling
00:00:09.000 --> 00:00:13.433
00:00:13.433 --> 00:00:16.006
Over just a few million years
00:00:16.006 --> 00:00:20.004
oxygen floods into the atmosphere
00:00:20.004 --> 00:00:22.006
bubbling intensifies
00:00:22.006 --> 00:00:26.633
Duration
28 seconds
Views
11
Timestamp in Movie
00:42:25
Uploaded
Feb 03, 2026
Season
50
Episode
11
Genres
documentary

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Movie Summary

Science documentaries about various topics.
S50 • E02 BUIE: That small stone there is exactly north of this stone. - Nova 00:24
BUIE: That small stone there is exactly north of this stone.
S50 • E13 As the ice sheets expand and contract, over millions of years, sea levels fluctuate, creating huge deltas where vast swamp forests spring up... - Nova 00:15
As the ice sheets expand and contract, over millions of...
S46 • E12 We saw bright highlands, but they had dark drainage channels. - Nova 00:07
We saw bright highlands, but they had dark drainage channels...
S46 • E19 In the very upper part of the bluffs, - Nova 00:11
In the very upper part of the bluffs,
S50 • E07 Only four hours earlier, they photographed this five-year-old male gear-free. - Nova 00:14
Only four hours earlier, they photographed this...
S50 • E13 ...covering millions of square miles......and giving rise to a whole host of new plant species that thrive in these wet conditions. - Nova 00:16
...covering millions of square miles......and giving rise to...
S46 • E12 When you're looking at it, - Nova 00:14
When you're looking at it,
S46 • E02 With clear skies finally overhead, - Nova 00:08
With clear skies finally overhead,
S50 • E02 NARRATOR: There were several ways the stone circle builders could have found north. - Nova 00:25
NARRATOR: There were several ways the stone circle builders...
S50 • E11 The very composition of the atmosphere itself is changing. - Nova 00:08
The very composition of the atmosphere itself is changing.
S50 • E07 Senior scientist Moira Brown is a member of New Brunswick's Campobello Whale Rescue Team. - Nova 00:30
Senior scientist Moira Brown is a member of New...
S50 • E13 The largest among them, Lepidodendrons, grow over 160 feet tall. - Nova 00:08
The largest among them, Lepidodendrons, grow over 160 feet...
S50 • E13 These are part of a group called lycopods, or scale trees. - Nova 00:07
These are part of a group called lycopods, or scale trees.
S50 • E02 BUIE: Makes me wonder, which came first? - Nova 00:28
BUIE: Makes me wonder, which came first?
S50 • E13 It looks like it's not a plant. - Nova 00:16
It looks like it's not a plant.
S49 • E12 ATTENBOROUGH: Those that live underground may have had a better chance. - Nova 00:28
ATTENBOROUGH: Those that live underground may have had a bet...
S46 • E06 To fracture the caprock completely - Nova 00:16
To fracture the caprock completely
S50 • E07 So this whale is thrashing too much and too unsettled to put anybody in a small boat near this whale. - Nova 00:35
So this whale is thrashing too much and too unsettled to put...
S50 • E13 NARRATOR: The swamp forests these trees grew in would've looked similar to today's, except those trees would've grown incredibly quickly, creating a huge amount of plant mass in a very short time. - Nova 00:53
NARRATOR: The swamp forests these trees grew in...
S50 • E08 NARRATOR: Taaniela and Shane enlist the help of boatmen from the neighboring island of Kotu. - Nova 00:24
NARRATOR: Taaniela and Shane enlist the help of boatmen from...