Inexplicable Orca Behavior Continues to Disrupt Sailboat Races.

An orca rammed a yacht off the Scottish coast, more than 2,000 miles from the previous incidents of orcas attacking boats in Portugese and Spanish waters. Experts suspect the attacks are linked to human activities at sea, such as fishing, noise pollution, and boat traffic. The behavior appears to be spreading through social learning, with orcas imitating each other and reproducing acts they deem advantageous or interesting in some way.