TV News LIES

Wednesday, Mar 29th

Last update05:20:13 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...


Study: Amazon River is at least 9 million years old

Amazon River is 9m years oldAccording to new research, the Amazon River is between 9 and 9.4 million years old. Estimates...

Newfound 3.77-billion-year-old fossils could be earliest evidence of life on Earth

microfossils 3.77 billion years oldTiny, tubular structures uncovered in ancient Canadian rocks could be remnants of some of the earliest...

Hubble finds young super star cluster, giant star

Super star cluster discoveredNASA scientists have gotten a closer look at one of the largest stars ever discovered in...

Thrilling discovery of seven Earth-sized planets orbiting nearby star

Secen earth siaze planets discoveredA huddle of seven worlds, all close in size to Earth, and perhaps warm enough for...
 
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!