National security, unlocked. Each Thursday, host Mary Louise Kelly and a team of NPR correspondents discuss the biggest national security news of the week. With decades of reporting from battlefields ...

Scientific method is a body of techniques for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge. It is based on gathering observable, empirical and ...

Cooking can reduce water-soluble vitamins like vitamin C and B vitamins, fat-soluble vitamins, and minerals such as potassium and magnesium. However, some cooking methods can help preserve nutrients.