Scientists are debating the Earth's first creature, with evidence pointing to simple, sponge-like organisms emerging around ...

For millions of years, the land we now call the United States has been home to towering prehistoric beasts, strange sea creatures, and lush ancient forests that no longer exist. Evidence of this ...

Scientists have made a jaw-dropping discovery, a 520-million-year-old fossil that has preserved not just its body, but its ...

MIT researchers traced chemical fossils in ancient rocks back to the ancestors of today’s demosponges. A team of geochemists ...