Nairobi has landed a top position in cities spurring technology and real estate development with a potential of being the leading African country in socio-economic growth, a report has said.

Astronomers call them super-Earths, and they are abundant outside our solar system. But the more experts learn about them, the weirder our own planet seems in comparison. Planets the size of Earth and up to four times larger are believed to make up about three-quarters of the planet candidates discovered by NASA's Kepler spacecraft.