Harvard University researchers say they’ve found evidence that the outer layers of the Earth more than 3 billion years ago cracked into shifting tectonic plates, as they are today, adding to a debate ...

For hundreds of millions of years, Earth’s climate has warmed and cooled with natural fluctuations in the level of carbon dioxide (CO₂) in the atmosphere. Over the past century, humans have pushed CO₂ ...

Latitude shapes climate in a basic but powerful way. It controls the angle of sunlight, which helps decide whether a place ...