Britain's Royal Mail has started using drones to deliver mail on the Orkney Islands in northern Scotland. This could pave the way for parcels to be delivered by this method both in the archipelagos around the UK and on the British mainland, particularly during emergencies. The drones, which can carry parcels weighing up to six kilograms, oper...
After less than half a year, another record has been broken. KAUST University in Saudi Arabia has succeeded in developing tandem solar cells combining silicon and perovskite with a record efficiency of 33.2%. Late last year, tandem solar cells with a record 32.5% efficiency were unveiled. These were backed by Helmholtz Zentrum Berlin (HZB), b...
