A a Boeing 747 carrying a herd of 390 cows which apparently gave off so much heat onboard the plane that they set off the fire alarm and caused an emergency landing. As such the plane had to make an emergency landing at London’s Heathrow Airport.
The plane was flying over the Irish Sea when a fire alarm sounded from where the 390 cows were being kept, reports the Sunday People. After the plane landed, technicians inspected the plane, but found no evidence of any smoke. Instead, they concluded that the alarm was set off by the cows. The event was logged by Britain’s aviation watchdog, the Civil Aviation Authority.