They first emerged on land around 400 million years ago, and were thick-waisted versions called trigonotarbids. They also ...

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For more than 150 years, scientists have debated whether Prototaxites—which stood roughly 24 feet tall and 3 feet wide—were an early lichen or fungus, like a “giant mushroom” ...

Earth 400+ million years ago. We often look at sharks with fear, but it’s equally important to recognize their evolutionary longevity—something that can be seen in their statuesque faces ...

One of the most important milestones in the evolution of life began some 400 million years ago, when the first animals made their way from water onto land. At that time, known as the Devonian ...

The earliest humans emerged about 300,000 years ago. While many of Earth’s earliest ... is an arachnid whose lineage dates back over 400 million years, making it one of the most ancient and ...