T cells are white blood cells that are important for adaptive immunity. They have unique cell surface receptors that are generated by randomly assorting genes. These receptors allow T cells to ...

And it’s breathtaking: Galaxies of all shapes and sizes seem to be swimming about in a dark cosmic ocean, one peppered with strange circlets of starlight and erupting supermassive black holes.

CAIRO — Archaeologists have discovered the large limestone burial chamber of an unidentified ancient Egyptian pharaoh near the city of Abydos dating to about 3,600 years ago during a chaotic ...

(CNN) — Hamas has agreed to a new Egyptian proposal to release 5 hostages, including the American-Israeli Edan Alexander, in exchange for a renewed ceasefire, a Hamas source tells CNN.

(CNN) — Hamas has agreed to a new Egyptian proposal to release 5 hostages, including the American-Israeli Edan Alexander, in exchange for a renewed ceasefire, a Hamas source tells CNN. Hamas leader ...

Archaeologists have discovered the large limestone burial chamber of an unidentified ancient Egyptian pharaoh near the city of Abydos dating to about 3,600 years ago during a chaotic period in Egypt's ...