Farmers in the US who want to know when their cows become fertile can glue a
special patch called HeatWatch to their tails. Inside the patch is a
piezoelectric sensor and a tiny radio with a 400-metre range. Farmers normally
know that a cow is in oestrus when other cows in the herd try to mount her. When
a cow receives unwelcome attention from other cows the piezoelectric pressure
sensor is triggered and a radio signal is sent. Cows are only in oestrus for
10–12 hours each month. So the patch will be a boon to farmers, telling
them the optimum time to artificially inseminate the cows.
More from 51¶¯Âþ
Explore the latest news, articles and features
Popular articles
Trending 51¶¯Âþ articles
1
The Selfish Gene at 50: Why Dawkins’s evolution classic still holds up
2
How I used psychology to come back from the worst year of my life
3
Photos reveal unexpected details from the world's first atomic test
4
Mathematicians stunned by AI's biggest breakthrough in mathematics yet
5
Putting CO2 into rocks and getting hydrogen out is climate double win
6
Can we harness quantum effects to create a new kind of healthcare?
7
We may finally know why dinosaurs like T. rex evolved tiny arms
8
Epic dreaming is leaving people exhausted and distressed
9
Colossal claims an artificial eggshell will help it bring back the moa
10
The ‘doomsday’ glacier’s giant ice shelf is about to break away
