Notebook

Astronomy

Here’s what space toilets can teach us about finding signs of alien life

Lessons learned from flushing space toilets can help researchers plan life-hunting missions to icy moons.

Animals

Surgeon aims to diagnose deformities of extinct saber-toothed cats

Using CT scans, one orthopedic surgeon is on a quest to diagnose deformities in long-dead saber-toothed cats.

Tech

The rise of respectful robots

A new roaming robot knows how to keep out from underfoot.

Astronomy

50 years ago, a spacecraft discovered oxygen in moon rocks

In 1967, scientists dreamed of lunar processing plants to turn moon rocks into oxygen.