An Alaska volcano spewed an ash cloud with an estimated of height of 23,000 feet, according to CNN. Although Cleveland Volcano, which forms the western half of Chuginadak Island off the coast of mainland Alaska, hasn’t coughed up anything else …

Peri Sasnett of the Department of Earth and Environmental Sciences at Columbia University has lead a team of researchers to study Ubehebe. Ubehebe is a large volcanic crater in the north of Death Valley. Using technology taken from the dating …