New research finds some baleen whale species call at such deep frequencies that they're completely undetectable by killer whales, which cannot hear sounds below 100 hertz. These also tend to be the ...

Our study was one of the first to date Florida coastal deposits using fossil shark teeth and a technique that looks at variations in ocean strontium. Strontium is a chemical element that occurs ...

Remarkably, fossil shark teeth are also incredibly abundant. Sharks ruled the earth's oceans for 400 million years, and every individual grows and sheds thousands of teeth in their lifetime.

These love tokens were made from whale bone, baleen, walrus tusks, and sperm whale teeth and often depicted portraits of their loved ones, pictures of their ships, and patriotic imagery.

But killer whale teeth rakes were evident on much of the estimated 25-foot carcass. Schulman-Janiger, also Lead Research Biologist for the California Killer Whale Project, said the orcas are ...

The ratios of strontium isotopes in fossil shark teeth can be used to better understand how coastal environments evolved in ancient times, according to our newly published work. As paleontologists ...

(MENAFN- The Conversation) The ratios of strontium isotopes in fossil shark teeth can be used to better understand how coastal environments evolved in ancient times, according to our newly ...