Danielle Futselaar/SETI International
NASA/JPL-Caltech/UArizona
Digital Vision./Ray Massey (Getty Images)
NASA / JPL-Caltech
Zolla Chen/Shutterstock
A Harvard professor and his team claim that tiny balls from the Pacific Ocean may be evidence of alien technology. A new report disputes the idea.
Lucas Jackson/Reuters
Marco Ugarte / Associated Press
US Department of Defense/Navy Times