Flamingoes are seen in the waters of Lake Nakuru, about 120 km west of Nairobi, capital of Kenya. The population of flamingoes in Lake Nakuru is at high level, with a number of more than 800 thousands because of abundance of water and recovery of natural environment in this region.

Round-the-world balloooning pioneer Bertrand Piccard unveiled his solar-powered aircraft in Switzerland on Friday, ready for another trend-setting circumnavigation of the globe powered solely by the sun.

The wasp-shaped prototype of Solar Impulse, with the wingspan of a jumbo jet, was rolled out before some 800 guests at an airfield near Zurich after six years of development.

Ten years after Piccard and Briton Brian Jones achieved the first non-stop flight around the globe in the Orbiter balloon, the Solar Impulse team are aiming to demonstrate that reliance on renewable energy is not a pipedream.