TV News LIES

Friday, Sep 04th

Last update04:43:46 AM GMT

You are here News Science How old is sonar? Fossilized whale skull puts it at over 32 million years.

How old is sonar? Fossilized whale skull puts it at over 32 million years.

cotylocara maceio

Sperm whales do it. Dolphins do it. Orcas do it. And now, researchers have unveiled the fossilized skull of a 28-million-year-old marine mammal that did it too – used sound to find its next meal or swim safely through turbid waters.

The creature, Cotylocara macei, is the earliest known cetacean to show skeletal evidence for a natural form of sonar, according to a research team reporting the results in Thursday's issue of the journal Nature.

After comparing the nearly complete skull with those of other fossil cetaceans, the team placed C. macei on the evolutionary tree just above the common ancestor to all toothed cetaceans. That branch of the whale family uses echolocation to find its food, unlike their cousins who feed by straining seawater through boney baleen plates. Right and humpback whales are modern examples of these strainers.

The study "provides an important new piece of information on when echolocation originated, such that it originated almost immediately after the split between baleen whales and toothed whales," notes Frants Jensen, a researcher at the Woods Hole Oceanographic Institution in Woods Hole, Mass., who studies marine echolocation.

More...

 


Most Recent Related Stories...


Ion collider produces droplets of primordial goo

primordial liquid produced in labhe Relativistic Heavy Ion Collider just spit out tiny droplets of a liquid researchers say resembles...

Astronomers spot 20 million year young, 'Jupiter-like' planet

New Jupiter-like planetAstronomers have spotted a Jupiter-like planet that could hold the answer to how our solar system...

Hawking: Info Can Escape Black Holes

Stephen HawkingStephen Hawking announced during a lecture at the KTH Royal Institute of Technology in Stockholm, Sweden...

Scientists say fetal tissue essential for medical research

Scientists need fetal tissue for researchThe furor on Capitol Hill over Planned Parenthood has stoked a debate about the use of...
 
America's # 1 Enemy
Tee Shirt
& Help Support TvNewsLIES.org!
TVNL Tee Shirt
 
TVNL TOTE BAG
Conserve our Planet
& Help Support TvNewsLIES.org!
 
Get your 9/11 & Media
Deception Dollars
& Help Support TvNewsLIES.org!
 
The Loaded Deck
The First & the Best!
The Media & Bush Admin Exposed!