New research identifies two new enzymes in bacteria that help fight off infection at a later stage, after an invading virus has already begun to replicate. The enzymes are part of the CRISPR-Cas ...

In recent weeks California's Central Valley has been blanketed with a thick dense fog known as tule (TOO-lee) fog, causing massive vehicle pileups along Interstate-5 along Highway CA-99. It's a type ...

Add Yahoo as a preferred source to see more of our stories on Google. An artist's impression of what Prototaxites may have looked like 400 million years ago. - Matt Humpage Some 400 million years ago, ...

Good drugs are potent and specific; that is, they must have strong effects on a specific biological pathway and minimal effects on all other pathways. Confirmation that a compound inhibits the ...

Each day, after feeding his cat and tidying up his home, Johnny Miller has one more task left on his to-do list: confirm on his phone that he is indeed still alive. He does this through a Chinese app ...