A Philadelphia-area woman is among a growing number of younger women with cardiovascular disease. This device saved her life.

Einstein–Rosen bridges may reflect a two-directional structure of time that preserves information and hints at a pre–Big Bang universe.

After some serious number crunching, a researcher says that he has come up with a mathematical model for a viable time machine: a Traversable Acausal Retrograde Domain in Space-time (TARDIS). He ...

Before Einstein, special relativity, and E = mc 2, what was the prevailing theory on the Sun's seemingly eternal energy? William Fields Dayton, Ohio The question of what energy source powers the Sun ...

Dec. 23, 2025 A new discovery shows that messy, stray light can be used to clean up quantum systems instead of disrupting them. University of Iowa researchers found that unwanted photons produced by ...

Creatine is a nonessential amino acid produced in the body from other amino acids. It is found mostly in muscles, including the heart, and in small amounts in the brain. Most people can get creatine ...

Hubble tension reveals discrepancies in cosmic expansion rates, leading to investigations of rotating universes and their ...