Hundreds of vendors from dozens of countries converged in Tucson, Arizona, for the annual Gem and Mineral Show, where the ...

The San Francisco Bay-Delta and Sacramento-San Joaquin river system are home to a rare, enormous species of living fossil called the green sturgeon. The ancient fish has survived unchanged for almost ...

Both fossil specimens were excavated from the Green River Formation in eastern Utah ... Lake sediment and volcanic ash slowed decomposition in fish, reptile, bird and plant remains, enabling ...