Sunday, December 29, 2019

Hydrogen-powered drones could point way to future travel

Hydrogen-powered drones have several advantages to lithium ion-powered ones, says Dr Enass Abo-Hamed.

from BBC News - Home https://ift.tt/2Qyv76b

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'I can't hear it' - Wimbledon's first day of electronic calling

Some players have said the calls are too quiet. Others say they miss the tradition. How has the first day of electronic line-calling gone at...