Monday, January 14, 2008

Dinosaurs Keep Getting Less Like Lizards

In school they taught us at Pound360 that dinosaurs were basically huge lizards. The name “dinosaur,” in fact, is Greek for “fearsome lizard.” But the more I read on the subject of dinos, the less like lizards and the more like birds they become.

A while back, we reported on how velociraptor skeletons showed evidence
the predators were feathered. Also, we learned last year that dinosaurs had air sacks, like modern birds, to help them extract more oxygen from the thin atmosphere of their time. And last summer, they found a giant “chicken-like dinosaur,” despite the theory that dinosaurs became more bird-like only as they got smaller.

new research reported by the BBC suggest dinosaur life cycles were similar to birds. According to a report from the University of California, dinosaurs appeared to reach sexual maturity early in life, like birds today, so they could reproduce before being killed by predators. On average, dinosaurs lived to the age of 30 and reached sexual maturity by age eight.

Such a short lifespan means dinosaurs grew fast, and according to an expert close to the UC study, “to do this you can't have the metabolism of a crocodile; you need to have the metabolism more of a bird or a mammal."

Scientists reached their conclusion after examining the bones of juvenile females showing signs of “egg-making” tissue, called “medullary bone,” also found in modern birds. Finding evidence of medullary bone in dinosaur fossils is pretty rare since it’s “only around for three to four weeks in females who are reproductively mature.”


750unique said...

jorda femme pas cher
cheap oakley sunglasses
ed hardy uk clothing
mcm outlet online
tory burch handbags
chanel handbags
longchamp pas cher
pandora bracelets
abercrombie and fitch
toms shoes sale
polo ralph lauren uk
cheap oakleys
nike blazer high
gucci sito ufficiale
michael kors outlet
mont blanc
air jordan uk
christian louboutin shoes
air max 2015
coach outlet
hollister kids clothing
christian louboutin
oakley sunglasses outlet
ray ban glasses
ralph lauren pas cher
true religion outlet
polo ralph lauren
ed hardy outlet
coach factory outlet
michael kors outlet online
soccer outlet
longchamp pliage
tory burch shoes
cheap jordans uk
ray ban sunglasses

Brand Official discount store said...

Ancona is a city and Jimmy Choo Heels a sea port in the Marche, a region of central Italy. The city is the centre of the province of Ancona and the capital of the region. It is the busy administrative capital of the Marche and the largest city Karen Millen Black in the region. The city is mostly known as a modern port, not a tourist town. Jimmy Choo Red Shoes The name Ancona means elbow, referring to the shape of its geographical positionAncona is a great place to visit if your purpose is to see how an unspoiled Italian city lives. The port Gucci Quotes of Ancona is one of the most important on the Adriatic coast offering travellers the chance to board ferries Jimmy Choo Designer to Croatia and Greece.The best way to get around Snap Back Hat Store the city is on foot. The city centre is compact Snapback Hat World and is full of monuments. Trattoria la Moretta restaurant was started in 1897 Jimmy Choo Shoes by Santa Maguini, and is the oldest continuously operating restaurant in the city.On the last Sunday of every month there is an antiques market in Piazza Cavour. The old town also has the most interesting shops where antiques and gifts can be purchased. The oldest part of town straddles Colle Guasco, the hill above the port. On its peak, high above the agitation of the modern city, stands Ancona's finest church. The locals of the city say that Gucci Belts Sale the city offers a tame night life. Usually they chill out and chat in bars and restaurants of the city centre until 10pm. Restaurants are plentiful and serve great meat dishes. The cuisine of this area is mostly meat based. Ancient historians and naturalist praises the local wines, Gucci Quotes especially the ones in the area of Ancona. Today, the region has a great territory, spacious hill areas, and is heading in a positive direction for its wine industry.The Natural Park of the Conero was established in 1987, is a magnificent area where respect and safeguard of the environment prevails. It protects one third of the regions plant species, and also has a great variety of animal life living there.The Cathedral church of St. Ciriaco was consecrated in 1128 and completed in 1189. An early restoration was completed in 1234. It is a fine Romanesque building in grey stone, built in the form of a Greek cross, with a KarenMillens dodecagonal dome over the centre slightly altered by Margaritone d'Arezzo in 1270. The fasade has a Gothic portal, ascribed to Giorgio da Como in 1228.

raybanoutlet001 said...

coach outlet
kate spade outlet
jordan shoes
nike shoes
ray ban sunglasses outlet
toms outlet
nike roshe run
ugg boots
nike factory store
ugg boots

林磊 said...

20170711 leilei3915
polo outlet
adidas yeezy shoes
fred perry shirts
polo outlet
ralph lauren outlet
mont blanc pens
kate spade outlet
lebron james shoes
nike outlet store
polo ralph lauren

raybanoutlet001 said...

oakley sunglasses
coach factory outlet
sac longchamp
pandora outlet
true religion outlet store
replica watches
kate spade outlet
louboutin shoes
coach outlet online
moncler jackets

qqq said...

adidas shoes
sac longchamp
toms shoes
coach outlet
christian louboutin
louis vuitton handbags outlet
burberry outlet
pandora jewelry
dansko outlet
ralph lauren uk

raybanoutlet001 said...

ed hardy uk
michael kors outlet
nike air huarache
ray ban sunglasses
jordan 4
ugg outlet
supra sneakers
ray ban sunglasses
ugg outlet
fitflops shoes

Fghkfhk Dfgaert said...

fred perry polo shirts
longchamp bags
coach factory outlet
cheap snapbacks
polo outlet
air max trainers
christian louboutin outlet
ray ban sunglasses
suns jerseys
ralph lauren outlet

Pound360 Archive

About Me

My photo
I started pound360 to channel my obsession with vitamins, running and the five senses. Eventually, I got bored focusing on all that stuff, so I came back from a one month hiatus in May of 2007 (one year after launching Pound360) and broadened my mumblings here to include all science.