Sponges may be ancient, but their timeline has been murky. New research suggests the earliest sponges were soft and skeleton-free, explaining why their fossils don’t appear until much later. By ...

Earth’s earliest animals may have held evolution back because they reproduced asexually, creating low-competition communities ...

Our blue planet is home to countless creatures, some well-known, others still shrouded in mystery. From tiny tardigrades to massive blue whales, the diversity of life today reflects billions of years ...

Experts think they may have uncovered what the first ever animal on Earth looked like after ancient chemical signals were found. For as long as scientists have understood evolution, the debate over ...