When the sun goes down over large swathes of the developing world, the 1.3 billion people currently living without access to an electricity connection are plunged into darkness. According to figures ...

Solar day lamps (SDL) are simple and cost-effective. A few examples of SDLs have been described in [1], [2] and [3]. An SDL without any energy storage element suffers from frequent changes in the ...

MANILA, Philippines – Fifty-year-old Aeta grandmother Evelyn Clemente never imagined she would one day learn how to install solar-powered lamps. But on Monday, March 16, she and 3 other Aeta women ...

This series has been, for me, an exhilarating journey through two million years of human endeavour, passion and ingenuity. We began in East Africa with a chopping tool - a roughly shaped stone that ...