You've probably noticed the distortion of people and objects in a swimming pool, which occurs when light waves have to change direction as they pick up speed coming out of the water. Ripples on ...

Is frozen water scattered in systems around other stars? Astronomers have long expected it is, partially based on previous ...

According to Uber, no fewer than 35 million items are left behind in ride-hailing ... some downright bizarre objects. Among the most striking: a container of holy water, a construction site ...