Scientists revisiting mysterious 540-million-year-old microfossils from Brazil have overturned a major idea about early ...

Scientists have discovered a new species of small mammal that lived at the same time as dinosaurs, offering fresh clues about ...

For almost two decades, scientists have debated whether sponges or comb jellies are the first animal lineage. Now some are calling for a more harmonious approach. Which animals came first? For more ...