Today, Earth is home to animals of all shapes ... probably had little or no recognizable pattern. Related: What were the first animals to have sex? Turner presented what she proposes as the ...

The hard-boiled detectives came to their conclusion based on a single-celled organism that long predated our fine-feathered ...

Scientists at the University of Geneva have researched Chromosphaera perkinsii and believe they may have the answer.

The analysis of hundreds of fossilized droppings (plus a little bit of petrified vomit) from roughly 230 million years ago ...

As a result, the Cambrian seas were the birthplace of the first ... animals set the stage for all animal life on Earth, including us. Watch First Animals on The Nature of Things.

The colonisation of land by animals was a landmark event in the history of life on Earth. The first animals to set foot out of the oceans were believed to be arthropods, a highly successful group of ...

The first life forms to appear on Earth were unicellular, i.e. composed of a single cell, such as yeast or bacteria. Later, animals -- multicellular organisms -- evolved, developing from a single ...