We have not one but two new theories for you about the solar system’s long-theorized and mysterious Planet Nine: Does the solar system have a big, dark ninth planet drifting … Read more
Deep within Guatemala’s rainforest sits one of the most famous remnants of the Maya civilization: a roughly 2,000-year-old citadel turned to ruins called Tikal. When Alan Weisman hiked through the … Read more
If we discovered evidence of alien life, would we even realize it? Life on other planets could be so different from what we’re used to that we might not recognize … Read more
If you were to dive into a black hole (something we would not recommend), you”d likely find a singularity, or an infinitely small and dense point, at the center. Or … Read more
One night about 60 years ago, physicist Enrico Fermi looked up into the sky and asked, “Where is everybody?” He was talking about aliens. Today, scientists know that there are … Read more