World's oldest sonar system unearthed: Whale fossils reveal marine mammals using 'sound to see' 32 MILLION years ago
28 million-year-old fossil was of a species of whale called Cotylocara macei
Skull had air pockets similar to that used by dolphins to send sound beams
Find places origin of technique, called echolocation, to 32m years ago
This was relatively soon after whales, around 35 million years ago, split into two groups: active hunters and a toothless baleen species
By Ellie Zolfagharifard
Read more: http://www.dailymail.co.uk/sciencetech/article-2580220/Worlds-oldest-sonar-unearthed-Whale-fossils-reveal-creatures-using-sound-32-MILLION-years-ago.html#ixzz2w1jPdNd4
Could this explain how lake cryptids hunt prey and therefore don’t surface very often? Just a thought for the weekend.