In 1915, Albert Einstein unveiled his general theory of relativity and transformed our view of the fabric of the physical world. The theory, which explains gravitation as a deformation of space-time by mass, is a pinnacle of modern physics that underpins cosmology, from work on black holes to measurements of gravitational waves, and is used
Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. By signing up, you confirm you are 16+, will receive newsletters and promotional content and agree to our Terms of Use and acknowledge the data practices in our Privacy Policy. You may unsubscribe at any time. The Milky Way
Outsider Animals Marlene Zuk Princeton Univ. Press (2026) Evolutionary biologist Marlene Zuk’s charming book begins with a night-time encounter with young raccoons (Procyon lotor) on the deck outside her bedroom in California. They were playing noisily with a hose — and when she tried to shoo them away, one stood up and raised its forelegs,