The Hubble Space Telescope has imaged a "200,000 light-year-long trail of newborn stars" that may have been left behind by a ...

Dear Readers, Thank you. You liked the photo of the old, golden leaf as a symbol of the year we were about to say goodbye to.

The basics of photosynthesis are something that every student learns in school: carbon dioxide, water and light in; oxygen ...

Dermatologists explain the science behind wildly popular treatments like red light therapy, which is now available at home—for a steep price. Full-face LED masks like this one can cost up to several ...