Troposphere: This is the lowest layer of Earth’s atmosphere. The bottom of the troposphere is at Earth’s surface, and it extends up about 6.2 miles (or 33,000 feet).

Layers of the Earth's atmosphere TERRY THOMAS Dec 23, 2023 Updated Jan 26, 2025 0 1 of 2 Terry Thomas ...

Discover a vast, previously unknown world of microbial life that survives—and even thrives—for hundreds of millions of years ...

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 ...