The fossils of a monster predator with a circular jaw and a pair of claws on its head has been discovered in the old collections of the Smithsonian museum in Washington
A deficiency of oxygen and the heavy metal molybdenum in the ancient deep ocean may have delayed the evolution of animal life on Earth by nearly two billion years, a study led by UC Riverside...
Scientists examining rocks dating back 2.5 billion years said on Thursday they found evidence shedding light on one of the landmark events in Earth's natural history -- the appearance of...
A quirky creature with long, curved spines protruding from its armoured body prowled the ocean floor half a billion years ago near the dawn of complex life forms on Earth, scientists say.
They...
