Theory

Hiroshima University Discovers Rare Mineral on Asteroid Ryugu, Challenging Space Theories

Masaaki Miyahara said it’s like finding a tropical seed in Arctic ice - suggesting either a surprising local environment or long-distance transport in the early solar system.

 Ryugu.
 Nearly half of German driving test candidates fail theory exam. Illustration.

Nearly half of German driving test candidates fail theory exam

 Research suggests money emerged to facilitate exchange with strangers across borders.

Research suggests money emerged to facilitate exchange with strangers across borders

 Snow in northeastern United States.

Researchers find strong evidence for “Snowball Earth” theory