NYPD police commissioner talks about honor of being 1st Latino leader of force

Here's How 139 Countries Could Run on 100% Wind, Solar, And Hydro Power by 2050

Space 101: Here's How Hard It's Going to Be to Grow Food on MarsEverything You Need to Know About Tonight's Historic Blood Moon – The Longest This Century!

Our Milky Way Galaxy Used to Have a Huge Sibling, Until Andromeda Cannabalised ItScientists Have Finally Figured Out The Mysterious Source of All Mars' DustBREAKING: Einstein's Theory of Relativity Just Survived an Insane Test

BREAKING: Giant Lake of Liquid Water Found Hiding Under Mars' South PoleA Harvard Astrophysicist Says Outer Space Is Actually Closer Than We Think

Controversial New Paper Says The Moon May Have Once Been Able to Support Life

This Japanese Startup Wants to Make Fake Meteor Showers, And It's Not a Great IdeaThis Failed Supernova Might Have Given Us Our First Look at The Birth of a Black Hole

Astronomers Have Finally Pinpointed The Source of One of Those Mysterious Cosmic Radio BurstsNASA's Juno Spacecraft Just Shattered What We Knew About Jupiter

NASA Just Fast-Tracked Its Mission to Explore a $10,000 Quadrillion Metal AsteroidStar Wars Turns 40, Still Inspires Real-Life Space Junkies