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WDC joins US network to help rescue whales and dolphins

Goods news for whales and dolphins in the US. WDC's team there has officially joined...
Bryde's whale

Whalers in Japan return to port with over 200 whales

Japan's factory whaling ship, the "Nisshin Maru" returned to port on November 14th at the...
North Atlantic right whale

Success! Court stops US government attempt to block whale protection lawsuit

A federal court in the US has dismissed attempts by Joe Biden's administration to halt...

More good news for WDC’s End Captivity tour operators campaign

WDC's ongoing campaign asking tour operators not to promote cruel whale and dolphin captivity shows...

Early whales hearing similar to land animals

Whales and dolphins are renowned for their sensitive hearing but new research published in Current Biology suggests this was not always the case.

Using a CT scanner, scientists examined the fossils of two whales discovered during the last century in Togo, Africa. The whales were around 43-46 million years old, and while they lived in the sea, they still had legs which allowed them access to the land. Even though they would have been feeding on fish, they had not yet developed the ability to echolocate, used by modern-day toothed whales and dolphins.

Examination of their inner ears indicates these early whales could not yet pick up the extremes of high or low frequency sounds their descendants can. The separation into toothed and baleen whales occured around 35 million years ago and while it seems likely their specialised hearing evolved after this, the scientists have not ruled the possibility of discovering a common ancestor with highly developed hearing.

M. Mourlam and M. Orliac. Infrasonic and Ultrasonic Hearing Evolved after the Emergence of Modern Whales. Current Biology. Published online June 8, 2017. doi: 10.1016/j.cub.2017.04.061.