Seen and heard, the fireball is a stunning breakthrough into kilonovas, bursts of energy believed to produce metals like gold and uranium in the universe.

Pieces weighing up to 220 pounds could make it to the Earth's surface.

New techniques address some of gene-editing's technical and ethical concerns.

The size mismatch is the largest ever seen and challenges theories of how planets form.

Floating in zero gravity can change the brains of astronauts, according MRI images in a new study in the New England Journal of Medicine.

Scanning technology suggests there is a large, previously unknown cavity in the ancient monument.

The next launch attempt will be Sunday. Orbital ATK attributed the delay to a "small aircraft" spotted flying at 500 feet about six miles offshore.