Paraxanthine is the main metabolite of caffeine. Studies suggest it can boost alertness and focus, but the research base is much smaller than for caffeine.

Experiments with esports players show this non-caffeinated drink combats mental fatigue in a different way than coffee and ...

"If a signal gets broadened by its own star's environment, it can slip below our detection thresholds, even if it's there." ...

When we imagine alien life, we picture monsters, insects, or tentacles—but what if the most realistic aliens are human-like? Evolution tends to solve the same problems with similar designs, and ...

"If you fail this mission, you will never come home.?" Chroma has revealed the official trailer for an indie sci-fi film titled The Infinite Husk, ready for release starting in February in a few ...

Add Yahoo as a preferred source to see more of our stories on Google. (Photo by BRENDAN SMIALOWSKI/AFP via Getty Images) A new genetic study claims alien DNA could be inserted into humans. Dr. Max ...

Humans have created countless inventions that shape our lives in amazing ways. Some are practical, some are revolutionary, and some are simply fascinating. But if aliens suddenly appeared, which ...

Is it the invasion of the genome snatchers? Just in case the idea of aliens walking around in human skin suits wasn’t frightening enough. An outlandish study asserts that aliens might have abducted us ...

Alien: Earth suggests a future where consciousness isn't confined to the body you're born in, but is this a realistic possibility, or merely science fiction? We spoke to experts to find out. When you ...