While a full night of deep sleep stabilizes emotions, a sleepless one can trigger up to a 30% rise in anxiety levels, a new study shows.

For generations, the members of a family in Colombia have gotten early-onset Alzheimer’s disease. How one woman has resisted it could lead to future therapies, researchers say.

Exactly 40 years ago, a small group of scientists met at the world’s first climate conference in Geneva. They raised the alarm about unnerving climate trends.