Some newly found stars in a small galaxy called Sextans A are forming without some of the usual "ingredients," raising questions about how the early universe evolved.

In his new book, the oncologist and health policy expert discusses longevity, and how to best differentiate valid and effective health and wellness advice from "the speculative, deceptive, and just plain stupid."

Moscow's mayor said the drones were repelled over a period of about 17 hours. Russia says more than a hundred Ukrainian drones were launched.