By the early 1900s, scientists had identified major layers of the atmosphere based on how the temperature changed at different levels above the sea. Thanks to these studies, we now know the five ...

Marketing teams can then segment and target customers accordingly, tailoring content to well-defined niches. Overall, the marketing automation layer should integrate with CRMs and other marketing ...

Image caption, Without the ozone layer, planet Earth would be a very different place. One of those is the ozone layer. It’s basically the Earth’s sun cream - it protects the planet from ...

The Earth's interior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun. The deepest layer is a solid iron ball, about ...