The Earth sings every day - with the melody of millions of lightning bolts from erupting volcanoes. A listener in New Zealand can hear volcano lightning from as far off as Alaska, a new study reports.

Basic physical differences between women's and men's brains start in the womb and go right down to the genetic code. However, environment also plays a vital role.

Researchers are now engaging in data-intensive research where the volume, velocity and variety exceeds their capacity to extract information from it. What are the challenges in Africa?

Excavations at an archaeological site at Kathu in the Northern Cape province of South Africa have produced tens of thousands of tools almost 1 million years old.

Africa is second only to Asia in its number of city dwellers, and its urban population is growing rapidly. Yet understanding of African cities lags behind their development.

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