In early trials, a new vaccine that didn’t require refrigeration still protected against tetanus and diphtheria.

Shigella causes about 450,000 U.S. infections each year. An experimental oral vaccine protected adults in a small human trial.

Observational studies suggested the vaccine could do double duty but a randomized trial shows no benefit

Observational studies suggested the vaccine could do double duty but a randomized trial shows no benefit

A prehistoric scorpion was the largest ever to exist, and it may have preyed on land and freshwater species.

A prehistoric scorpion was the largest ever to exist, and it may have preyed on land and freshwater species.

A new method that detects whether bones have been burned reveals Homo erectus brought fires into caves far earlier than previous evidence had suggested

The new test may catch active tuberculosis in those with low access to health care or who have trouble making the phlegm needed for traditional tests.

Scientists speculate that the wild cats are trying to improve hydration or ease their cubs’ transition to solid food. The finding points to resilience in one of the world’s most endangered felines

Scientists speculate that the wild cats are trying to improve hydration or ease their cubs’ transition to solid food. The finding points to resilience in one of the world’s most endangered felines

Study highlights just how flexible cephalopod’s bodies are after injury and during recovery