Killer whales attack and sink sailing boat off Gibraltar

An unknown number of orcas rammed a sailing yacht in Moroccan waters in the Strait of Gibraltar on Sunday morning, causing it to later sink, the latest attack in a trend that has been terrifying sailors in the region for the past four years. 

How loud do cicadas get?

Certain species of cicadas in North America can produce calls reaching levels of around 100 decibels or higher, akin to the noise produced by a lawnmower or a passing jet aircraft.