Sign up to our newsletter
Don't worry, we won't give your email to any third parties
and you can unsubscribe at any time.
NASA/JHUAPL/SwRIPluto has a problem: Its thin, nitrogen atmosphere shouldn’t be there. Ultraviolet rays from the sun should have knocked it away, molecule by molecule, in the dwarf planet’s first few thousand years. Four billion years later, Pluto’s atmosphere is still...