Why African countries must invest more in earth sciences

The African continent contains some of the world's richest mineral resources. For instance, the Democratic Republic of Congo produces most of the world's cobalt; Rwanda, Ethiopia and Mozambique are major contributors to global ...

Why is the Earth blue?

Seen from space, the Earth is blue. The Earth has been blue for over 4 billion years because of the liquid water on its surface. How has the Earth managed to sustain liquid water on its surface for such a long time?

Researchers design next-generation photodetector

Northwestern University researchers have developed a new approach to quantum device design that has produced the first gain-based long-wavelength infrared (LWIR) photodetector using band structure engineering based on a type-II ...

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