The pandemic kept many children less active around the world, researchers find.

World's most sensitive dark matter detector delivers 1st results

World Population Will Reach 8 Billion By November, U.N. Says

Undead planets: The unusual conditions of the first exoplanet detection. The first ever exoplanets were discovered 30 years ago around a rapidly rotating star, called a pulsar. Now, astronomers have revealed that these planets may be incredibly rare.