Muscles weren't always in the fossil record. In fact, animals once went without this feature. Now, though, scientists have uncovered the earliest evidence for animals with muscles, which may also provide the oldest evidence of muscle tissue.
Scientists are learning a bit more about how our ancestors evolved by examining a strange, walking fish.
It turns out that a specimen discovered in Africa about 90 years ago, called the Taung Child, may not have the human-like brain that scientists once thought.
Scientists may have just managed to re-activate the expression of an ancient gene that causes animals to develop a fish-like thymus. The findings reveal a bit more about how the immune system evolved over the course of evolution.
Scientists have found that not all African pygmy phenotypes have the same genetic underpinning, hinting that this is a more recent adaptation than previously thought.
Scientists have discovered that Tibetans, who thrive in the thin air of the Tibetan Plateau, may have a single DNA base pair change that dates back 8,000 that could explain how they adapt to thin air.
A bizarre, worm-like creature with legs, spikes and a head difficult to tell apart from its tell has officially found its place in the evolutionary Tree of Life.
Scientists are learning a bit more about how the earliest animals on Earth developed and evolve. They've created new, three-dimensional reconstructions that could show why these early animals became extinct.
Scientists have found that feather lice that live in the plumage of Galapagos hawks are passed down from one generation to another like family heirlooms, evolving with different populations of hawks.
Scientists are using a butterfly's brilliant hues to their advantage. They've managed to change the color of butterfly wings by influencing the insect's evolution.
Songbirds migrate for thousands of miles each year between locations where they breed and raise their young and the areas where they spend their winter. But how did this migration first begin, and how did it evolve?