A giant lacewing hadn't been collected in the eastern U.S. for more than 50 years until a scientist stumbled upon a specimen at a Fayetteville Walmart.
Giant arthropods, cousins of contemporary species like shrimp, insects, and spiders, may have controlled the oceans 470 million years ago, according to findings at a new fossil site in Morocco.
A study published in Science has revealed a 525-million-year-old fossil of a tiny sea creature with a delicately preserved nervous system, solving a century-old debate over how the brain evolved in arthropods, the most species-rich group in the animal kingdom.