Ask Smithsonian: Why Are Planets Round?

The answer has everything to do with falling flat on your face (00:54)

Space

Preview thumbnail for The Ultimate Skywatching Guide for Every Season

The Ultimate Skywatching Guide for Every Season (02:41)

Preview thumbnail for Journey to the Unknown: Inside the Epic Artemis Moon Missions

Journey to the Unknown: Inside the Epic Artemis Moon Missions (02:20)

Preview thumbnail for The Space Launch System is the Most Powerful Rocket Ever Built

The Space Launch System is the Most Powerful Rocket Ever Built (02:26)

Preview thumbnail for How a 'Non-Hazardous' NASA Mission Turned Deadly

How a 'Non-Hazardous' NASA Mission Turned Deadly (04:03)

Preview thumbnail for How the Common Cold Affected the Crew of Apollo 7

How the Common Cold Affected the Crew of Apollo 7 (03:32)

Preview thumbnail for Apollo 13's Intense Comms Blackout

Apollo 13's Intense Comms Blackout (03:47)

Preview thumbnail for A Moon Sample Reveals a Surprising Link to Earth

A Moon Sample Reveals a Surprising Link to Earth (02:04)

Preview thumbnail for The Design of the Lunar Rover Was Mostly Guesswork

The Design of the Lunar Rover Was Mostly Guesswork (02:37)

Preview thumbnail for Five Kitchen Objects Inspired by NASA

Five Kitchen Objects Inspired by NASA (02:24)

Preview thumbnail for The Riskiest Maneuver in the History of the Space Program

The Riskiest Maneuver in the History of the Space Program (03:51)

Preview thumbnail for NASA's First Chimp in Space

NASA's First Chimp in Space (02:11)