An earthquake can start without any warning. One second everything feels normal, and the next a deep rumble shakes the ground. Dishes crash, objects fall from shelves, furniture moves, and pets panic.

Ahead of the 250th anniversary of the founding of the United States, we asked scientists, scholars, researchers, and doctors to tell us about the discoveries and developments that define this moment in American science and health.

Stop treating movement as an all-or-nothing event. Instead, break up prolonged bouts of sitting with a three-minute reset every half an hour for improved health.

Chelsea covers the Department of Health and Human Services with a particular focus on power and influence at the top. Confidential tips can be sent via Signal at chelseacirruzzo.42. WASHINGTON — Political appointees appear poised to gain more control ...

While other universities scale back research amid federal funding uncertainty, Tulane University will lead a sweeping redevelopment of the vacant Charity Hospital.

Many fermented foods are healthful in their own right, Dr. Marco said. A serving of kimchi or sauerkraut counts as a serving of vegetables, for instance, and yogurt and kefir provide calcium, potassium and protein.

The Mission Flight VR Experience lets visitors spacewalk outside the International Space Station, ride a Saturn V rocket, and stand on a biplane wing without leaving Cleveland.