Which way is ‘down’ has a different answer depending on where you are on Earth, in the solar system, in our galaxy and beyond ...

At half the size of Earth and one-tenth its mass, Mars is a featherweight as far as planets go. Yet new research reveals the ...

The origin of life is surely one of the most important questions in biology. How did inanimate molecules give rise to the ...

Discovered by volunteer scientists, this alien planet is out of synch with its siblings ...

Scientists reveal how bacteria switch direction through a microscopic tug-of-war inside their motors, driven by energy and ...