After years of debate, the International Chronostratigraphic Chart has officially been revised. What does that mean, exactly? Our current point in Earth's geological timeline has been updated so that ...

An influential panel of scientists voted this week to designate a new geologic epoch—the Anthropocene—to mark the profound ways that humans have altered the planet. That decision, by the 34-member ...

Humans have walked the Earth for 190,000 years, a mere blip in Earth's 4.5-billion-year history. A lot has happened in that time. Earth formed and oxygen levels rose in the foundational years of the ...