Monisha Ravisetti was a science writer at CNET. She covered climate change, space rockets, mathematical puzzles, dinosaur bones, black holes, supernovas, and sometimes, the drama of philosophical ...

Some social media posters are sharing video footage they claim shows an alien walking on the moon. The video, which is embedded in a 2021 blog post, shows a tall, thin creature walking and squatting ...

Artifacts last longer than signals and may be cheaper for alien civilizations to send out. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The ...