Earlier this week, researchers in Northern Ireland revealed that dogs can smell stress from human sweat and breath. 

In experiments, pooches of different breeds were able to distinguish between bodily samples from stressed and relaxed people with an accuracy of 93.75 per cent. 

The study could have applications for the use of emotional support service dogs - and adds to an impressive collection of scienti*** literature on how dogs can read humans. 

Dogs were domesticated around 30,000 years ago - and they've since developed a range of ingenious communication skills with humans. 

Here's a roundup of what dogs can do through their relationships with humans, from sensing when you're lying to knowing when you want an apology. 






From smelling when you're stressed to sensing when you're lying, here's the unique forms of communication between a dog and a human


DETECT WHEN WE'RE STRESSED

Scientists at Queen's University Belfast got four dogs - Treo, Fingal, Soot and Winnie - to sniff samples of bodily fluids taken from stressed and relaxed people.  

Sweat and breath samples were then collected from 36 people before and after they did a dif***ult maths problem, taken four minutes apart.



Their blood pressure and heart rate were measured both before and after the task, and participants also self-reported their stress levels.

The dogs were then introduced to the stressed and relaxed samples of participants whose vital signs had increased and who reported stress from the calculation.






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Scientists at Queen's University Belfast got four dogs - Treo, Fingal, Soot and Winnie - to sniff samples of the bodily fluids taken from stressed and relaxed people 



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