Police Radar Guns Could Help Identify Suicide Bombers
The radar guns police use to spot speeding motorists have inspired a version that aims to identify a would-be suicide bomber in a crowd. Here’s how it works. A radar gun fires microwave pulses at a car and measures the Doppler shift of the reflected signal to calculate its velocity. However, the strength and polarisation…
Tech News
Paul Marks - New Scientist
The Basic Secrets Behind Popular Circus Acts
While we don’t recommend running into your backyard and trying to recreate silly circus routines on your own, it’s still fascinating to know the general methods behind the tricks. So here are the basic “secrets” behind some popular circus acts. Now that the animals are gone from most of the traveling circuses, the majority of…
Tech News
Jill Harness - Neatorama