NASA’s Perseverance Mars Rover Extracts First Oxygen From Red Planet

Reducing light pollution doesn't only help humans see the stars—it avoids unintended harm to animals. Baby sea turtles can mistake city lights for moonlight and crawl into traffic or storm drains, and a study showed Manhattan's Sept. 11th memorial light affected the behavior of over 1 million birds.

Black, hispanic stroke survivors more likely to have changes in brain's blood vessels

Warming seas might also look less colorful to some fish. Here's why that matters.