With their identification of negative velocity, scientists have made a physics-defying discovery about how cells move.

If you've ever watched a glass blower at work, you've seen a material behaving in a very special way. As it cools, the viscosity of molten glass increases steadily but gradually, allowing it to be ...

In three spatial dimensions, it is a close relative of the quark-gluon plasma, the super-hot state of matter that hasn’t existed since the tiniest fraction of a second after the big bang that started ...