Two museum exhibits, one in the Smithsonian and one in Australia, have opened public displays featuring the spectacular meg. But while both models are mega impressive, they're not the same. Why?
Looking a bit like enlarged woodlice, ancient trilobites crawled along the seabed and had an exoskeleton made of calcite — nature's version of a suit of armour.
This newly discovered ancient monk seal is challenging previous theories about how and where monachine seals evolved. It's the biggest breakthrough in seal evolution research in about 70 years.
How ancient microbes survived in a world without oxygen has been a mystery. Scientists discovered a living microbial mat that uses arsenic instead of oxygen for photosynthesis and respiration.