Patients with von Willebrand disease (VWD) lack a protein that's essential for healthy blood clotting. But a newly approved medication could help with that.

Patients with a certain blood type may have a naturally lower risk of dying after heart surgery. Two added blood proteins mean that patients with AB blood are 20 percent are more likely to survive.

Evolutionary clues have led scientists to a discovery of how a key clotting protein assembles. This could aid in better understanding, and possibly treatments for common bleeding disorders.