These objects were actually the Andromeda and Messier 33 galaxies, the closest large galaxies to our Milky Way. Today, up to ...

Bacteria come in a surprising variety of shapes. In addition to rod-shaped representatives such as the widely known model bacterium E. coli, there are numerous curved and even spiral-shaped bacteria.

By looking at the shape and size of coprolites, as well as where they were found, scientists can work out what kind of animal the droppings might have come from. Coprolites can also contain clues ...