The record-breaking mission offers an unprecedented opportunity to study the geology of our planet’s largest layer.

If you were to slice through it, you would see the Earth is divided into distinct layers. On top is the relatively thin crust where we live. Beneath that is the 2,900 km thick mantle layer. Then ...

To download a pdf of this article, visit cenm.ag/earth-composition. References used to create this graphic: American Museum of Natural History. "Inge Lehmann: Discoverer of the Earth’s Inner ...

The beginnings of a strange layer of molten rock deep inside the Earth may have finally been figured out by geoscientists. This layer, known as the D" layer, is about 1,900 miles underneath the ...

Deep within Earth, there lies a mysterious layer called the D" layer. Located roughly 3,000 kilometers down, this zone sits just above the boundary between the planet's molten outer core and its ...

In 1970, Russian geologists drilled a nine-inch wide hole into the Kola Peninsula’s Baltic Shield — a part of Earth’s crust with rock well over a billion years old — and began digging as deep as they ...

For example, the tropopause exists between the troposphere, the layer that kisses the Earth, and the stratosphere, the next layer up. If you are an airline traveler, ...

The fourth layer of Earth's atmosphere is the thermosphere. It begins just above the mesosphere and extends to approximately 372 miles (600 km) high, according to NASA.

When the Hunga Tonga-Hunga Ha’apai volcano erupted underwater in January, it created a plume of ash and water that broke through the third layer of Earth’s atmosphere.

A pair of seismologists documented new evidence of a fifth layer: a 400-mile-thick solid metallic ball at the center of Earth’s inner core — like the smallest figurine of a massive, planetary ...

Scientists have long wondered what lies at the center of the Earth. New research is putting weight behind a theory that our home planet has a distinct ball of iron within its metallic core.