Outdoor Guide on MSN

South America's Most Dangerous (And Thrilling) Hikes

South America is a massive continent with wildly diverse terrain and ecosystems. Exploring it on foot is wondrous, but can be ...

3I/ATLAS Gets Mystery Acceleration—Harvard Astronomer Behind Alien Theory

A Harvard University professor has said that 3I/ATLAS experienced a sudden "nongravitational" acceleration while passing ...
Scientific American

The Race to Study an Interstellar Comet from Deep Space

Astronomers are hustling to use interplanetary spacecraft to study the interstellar comet dubbed 3I/ATLAS while the sun is ...