Avi Loeb, a Harvard astronomer who has made headlines with his theories about alien encounters, will lead a White House ...

WASHINGTON (AP) — A polarizing Harvard astronomer known for splashy theories about alien visits has been tapped by the White House to lead a team of outside scientists to study the national security ...

Scientists say they have built a cell from scratch for the first time that feeds, grows and replicates like a natural cell, a breakthrough in synthetic biology.

From chemical building blocks, scientists have created synthetic cells that have most of the hallmarks of life.