Dark matter with masses below 1 GeV can scatter, become captured, deposit annihilation energy, and increase the heat flow within extrasolar gas giants, rogue planets and brown dwarfs peppered throughout the Milky Way Galaxy, according to a paper published in the journal Physical Review Letters. Leane & Smirnov suggest light dark matter could be detected by measuring the effect it has on the temperature of exoplanets and brown dwarfs. Image credit:...