To us, they may be beautiful lumps of carbon—but to scientists, they’re 2.7-billion-year-old time capsules.
Mid-sized exoplanets seem to only appear after shedding their atmospheres over billions of years.
The secret ingredient is meteorite powder.
We should work out the consequences of filling the sky with sulfur before doing so, researchers urge.
Even after the densest clouds disperse, the effects from smoke last longer and travel farther than you might think.
But is that a good thing?
As the sky goes dark, robots will conduct atmospheric science.
Foot loose and frost-free.
Fasten your seatbelt
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