After a mini stroke at 25, Hailey Bieber discovered a congenital heart defect called PFO. Her story highlights stroke warning signs and the importance of early care.

Arctic ground squirrels and wood frogs exhibit incredible survival tactics, slowing metabolism to near-death states or tolerating being frozen solid. Even zebrafish embryos can suspend development ...

The warming climate in polar regions may significantly disrupt ocean circulation patterns, a new study indicates. Scientists discovered that in the distant past, growing inflows of freshwater from ...