Engineers working to tackle carcinogenic pollution from cars have developed cheap and simple devices to test the effectiveness of particle filters, which could help take toxic vehicles off roads without resorting to blanket bans.
Municipalities (...)
It has the wingspan of a Boeing 747 but weighs less than a small car.And it is powered entirely by the sun.
Adventurer Bertrand Piccard on Friday unveiled the Solar Impulse, which, with its sleek white wings and pink trimming, aims to make history (...)
