Today, Earth is home to animals of all shapes and ... and evolved over millions of years of evolution. But what was the first animal on the planet? The answer to this question is heavily debated ...

Life on Earth looks good ... the very first traces of life consist of microbial bacteria lacking a nucleus, while it’s widely accepted that animal organisms began more recently at about 635 ...

Today it represents something quite different: a set of extraordinary clues, recently reinterpreted, to one of the deepest and most puzzling mysteries of life on Earth. After burbling along for ...

dramatically. It was the time of the Cambrian Explosion, an eruption of life when Earth’s very first animals began appearing in the fossil record — the ancestors of all major animal groups ...

From 4.6 billion years ago when the Earth was red hot, the timeline illustrates the evolution of the first life forms through ... How have animal skeletons adapted? videoHow have animal skeletons ...

Many scientists think these primordial seas gave rise to life ... shielding the Earth's surface from harmful solar radiation. The first multicelled animals appeared in the fossil record almost ...

Over 390 million years ago, the ancestors of modern land animals said, “Feet before fins,” and took their first steps on earth ... ever before into one of life’s greatest evolutionary ...

The origins of life on our planet remains one of science’s great mysteries. Now, a NASA mission that brought a piece of an ...

The earliest humans emerged about 300,000 years ago. While many of Earth’s earliest life forms have long since gone extinct, some animals have stood the test of time–surviving through mass ...

The first creatures ... all the animals depending on that ice for hunting, resting, reproducing, and other key life activities lose the platform on which their existence depends. At the other end of ...

I travelled to the Rockies to help discover the history of animal life Maydianne ... species, in First Animals, a documentary from The Nature of Things. An incredible look at Earth’s distant ...