Sad but true: a new gun alarm is supposed to let Americans keep loaded guns
but stop their children playing with the weapons. The students at Yale
University who invented the device hope it will reduce the annual toll of 1300
deaths in shooting accidents. The Gun Guard uses a mercury switch, which acts as
a motion sensor, connected to a 120 decibel alarm. If the gun moves a
millimetre, a shrill alarm sounds.
More from 91av
Explore the latest news, articles and features
Life
Largest-ever octopus was great white shark of invertebrate predators
News
Technology
Do you need to worry about Mythos, Anthropic's computer-hacking AI?
News
Health
Catching a cold can delay cancer from spreading to the lungs
News
Health
Huge study reveals how Epstein-Barr virus may cause multiple sclerosis
News
Popular articles
Trending 91av articles
1
The monstrous number sequences that break the rules of mathematics
2
Why the right kind of stress is crucial for your health and happiness
3
Fermat's Last Theorem: still a must-read about a 350-year maths secret
4
Huge study reveals how Epstein-Barr virus may cause multiple sclerosis
5
Why your opinion of used electric vehicles is probably wrong
6
Game theory explains why the US's goals in Iran keep changing
7
Exercise advice for long covid may be doing more harm than good
8
Can you slow ageing with your diet? A new book gives it a go
9
Largest-ever octopus was great white shark of invertebrate predators
10
You can upgrade your immune system, but not in the way you think
