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What Does It Mean When We Say That Venus Has an Evolving Surface?
Amaze Lab
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yesterday
Is Venus one big bubble?
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Learning
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00:00
Despite being a veritable hellscape featuring the hottest temperatures in our solar system
00:07
and an atmosphere that's poisonous to humans, Venus is actually the most Earth-like planet
00:12
we know of. But there has always been one big difference. Experts don't believe that Venus
00:16
has plate tectonics. And while that's still technically the case, they're adding an addition.
00:20
Venus might have a squishy outer crust, or lithosphere as well. Looking at old data
00:25
from the Magellan orbiter, scientists now say that our yellow neighbor likely has a much thinner
00:29
crust than previously calculated. After examining these images closer, they realize that what they
00:34
initially thought were impact craters are actually coronae, rings of crust that are pushed up by
00:38
massive amounts of molten rock underneath, until they dome and eventually collapse in on themselves.
00:43
This sort of turned a lot of what experts thought they knew about Venus on its head,
00:46
as they didn't believe it was all that active. However, some 80% of the planet's surface is
00:51
covered in volcanic rock, and it had to be coming from somewhere. And it turns out it could be from
00:55
an ever-shifting surface caused by subterranean bubbling, with their researchers writing, quote,
00:59
while Venus doesn't have Earth-style tectonics, these regions of thin lithosphere appear to be
01:04
allowing significant amounts of heat to escape, similar to areas where new tectonic plates form
01:08
on Earth's seafloor.
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