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Technically speaking, a micrometeoroid is a tiny piece of rock that under normal circumstances (like say after passing through Earth’s atmosphere) would pose no danger. The problem is these things are never to be found in normal circumstances, and are known to travel through space at speeds of over 22,000 mph (35,400 kph). At those speeds, and with virtually no way to detect them in time, they’re like cannon shells for anyone or anything standing in their way. The Glenn Research Center is the place where something called Ballistic Impact Lab resides. That would be a facility that houses a...

Australia will send technical details to India as early as next week on the indigenous Bushmaster armoured protection vehicle — or protected mobility vehicle — after the country’s most senior defence officials expressed interest in using them to police India’s restive borders. A defence procurement contract for the Australian-made armoured vehicle, which has an unblemished record of no casualties in a decade of use in the ­Afghan battle theatre, would be a significant export for Australia as it builds its trade and defence relationship with India. Defence Minister Kevin Andrews, at the end of a three-day visit to India, said...