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Bruce Drinkwater, The Conversation

How a Star Trek-style sonic tractor beam became a reality

A millimetre-sized object has been levitated and moved around in mid-air using nothing but sound waves.

Bruce Drinkwater, The Conversation
· Oct 29, 2015 · 11:30 pm
How to find a hidden submarine (no, it’s not just a case of flicking the sonar on)

The Swedish navy is trying to find a Russian submarine in the waters off its coast.

Bruce Drinkwater, The Conversation
· Oct 24, 2014 · 04:30 pm