Extinctions review: A fast-paced story of going extinct on Earth

Space junk in Earth orbit and on the Moon will increase with future missions − but nobody's in charge of cleaning it up

Meteor scientists weigh in on Avi Loeb's latest preprint on supposed meteorite spherules from Pacific Ocean expedition: May be meteorites, but unlikely interstellar/evidence of alien technosignature on Earth

Could an 'Earth-like' planet be hiding in our solar system's outer reaches?