Rat catchers may need to up their game. The distress shown by a trapped rat will encourage another rat to spring the trap and free the rodent. The finding suggests the common pest shows a level of ...

Cities across the northeast are seeing a spike in complaints about rats. With high-tech traps and carbon monoxide gas, the Boston area is taking on its growing problem.

A trapped rat's distress encourages a cage-mate to spring the trap and free the rodent \u2013 and they even share a chocolate reward afterwards ...