It Took Six Months For Dinosaur Eggs To Hatch

A hatchling Protoceratops andrewsi fossil from the Gobi Desert in Mongolia. Credit M. Ellison/American Museum of Natural History

New York Times: Some Dinosaur Eggs Took Six Months or More to Hatch

For decades now, the drumbeat of dinosaur news has been their similarity to birds. They were warmblooded! They had feathers! And they’re still around, because birds are actually dinosaurs.

All true, but those that were nonavian dinosaurs, as they are now called, were not all beak and tweet. They were closely related to other living reptiles like crocodiles, and new findings about how long their eggs took to hatch bring that point home.

Scientists reported on Monday that by using a new technique on exceedingly rare fossils of unhatched dinosaur embryos, they determined that those embryos took twice as long to hatch as bird eggs of a similar size. The embryo of a large duck-billed dinosaur took at least six months to hatch, and the eggs of larger dinosaurs may have taken even longer.

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More News On How Long Did It Take Dinosaur Eggs To Hatch

No wonder the dinosaurs died out: They were vulnerable for the SIX MONTHS it took them to get out of their eggs when they were born -- Daily Mail
We Finally Know How Long It Took for Dinosaur Eggs to Hatch -- Seeker
Did Dinosaur Eggs Lead To Their Doom? -- Discover Magazine
Dinosaur 'Baby Teeth' Reveal That Dino Eggs Hatched Slowly -- NPR
Dinosaur eggs: Slow hatching eggs made dinosaurs go extinct when asteroid struck -- International Business Times

How Did Dinosaurs Woo Mates?

The Guardian: Dinosaurs performed dances to woo mates, according to new evidence

‘Dinosaur foreplay’ was a ritual, bird-like dance, according to paleontologists who studied huge scrape marks left behind by the animals in western Colorado

Predatory dinosaurs performed a ritual, bird-like dance to woo their mates, according to paleontologists who have studied huge scrape marks left behind by the animals in western Colorado.

Paleobiologists have long speculated that dinosaurs had mating rituals like those of their descendants, modern birds, but the scrapes would be the first physical evidence of “dinosaur foreplay”, lead scientist Martin Lockley said.

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Editor: These scrapes could have been caused by dinosaurs clipping their long nails ... bottom lone is that we do not know. But the mating ritual theory is definitely more interesting.

How Did Dinosaurs Mate?

Tyrannosaurus rex dinosaurs mating - like most dinosaur species, the creatures mated like dogs

The Joy Of T-Rex: Scientists Show How Dinosaurs Had Sex (Tricky, When You Weigh 30 Tonnes And One Crucial Part Is 12ft Long) -- Daily Mail

Palaeontologists answer many tricky questions about dinosaurs - but perhaps the most interesting is how did 30-ton animals larger than four-storey buildings have sex.

A surprising amount of research has been devoted to the subject - and most researchers have concluded that dinosaurs made love like dogs

'All dinosaurs used the same basic position to mate,' said Dr Beverly Halstead, an English researcher who was one of the first to tackle the subject. 'Mounting from the rear, he put his forelimbs on her shoulders, lifting one hind limb across her back and twisting his tail under hers.'

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My Comment: 12 feet long?

Mongolia Wants Its $1m T-Rex Back

The skeleton of a Tyrannosaurus bataar will be sold at Heritage Auction's Natural History sale on May 20. It is estimated between $950,000 and $1.5 million. Source: Heritage Auctions via Bloomberg

Disputed Dinosaur Fossil Auctioned For $1M In NYC -- CBS

NEW YORK — A dinosaur dispute is brewing between the Mongolian government and an American auction house, which sold a fossil of a fearsome T. Rex relative despite a court order not to.

The 8-foot-tall, 24-foot-long skeleton of a Tyannosaurus bataar — or tarbosaurus, a name that means "alarming lizard" — went for $1,052,500 Sunday at a New York auction, says Heritage Auctions, which hasn't identified the buyer or seller. But the sale is contingent on the outcome of the Dallas-based auction house's court fight with Mongolian President Elbegdorj Tsakhia, the auction house said.

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Update: Dinosaur fossil auctioned for more than $1M in NYC despite dispute with Mongolian government -- Washington Post/AP

My Comment: There's money in those bones.

Who Laid These Eggs?

Eggs-traordinary: A man looks at one of the dinosaur eggs, which number around 40 so far

Eggs-Traordinary: 40 Gigantic dinosaur Eggs Dating Back 60Million Years Found In Chechnya - but What Laid Them Is A Mystery -- Daily Mail

* The eggs are between 25cm and a metre in height

Geologists in Russia's volatile Chechnya region have discovered what they believe to be fossilised dinosaur eggs laid by one of the huge extinct reptiles that roamed the Earth more than 60million years ago.

'We've found about 40 eggs so far, the exact number has not been established,’ said Said-Emin Dzhabrailov, a geologist at the Chechen State University.

‘There could be many more lying under the ground.’

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My Comment: Wow .... these dinosaurs must have been huge .... correction .... super huge.

Fossilized In The Act: Ancient Armored Fish Downs Flying Reptile

A fossilized hunting scene showing an ancient armored fish taking down a pterosaur, likely by snagging the low-flying reptile by the wing and pulling it under water. CREDIT: PLoS ONE

Caught In The Act: Ancient Armored Fish Downs Flying Reptile -- Live Science

An ancient armored fish was fossilized in the act of attacking and drowning a pterosaur in a toxic Jurassic lake, revealing that the winged reptiles were victims of a wide variety of carnivores, scientists find.

Pterosaurs dominated the skies during the Age of Dinosaurs. Still, flight did not always ensure them safety — researchers have recently discovered that Velociraptor dined on the flying reptiles.

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My Comment: One has to be impressed by what must have been happening years ago. Just when you think you have dinner .... you die .... and millions of years later we are able to see the act.

Has The Father Of Triceratops Been Found?

The skull on the left is the Titanoceratops skull, the missing parts of which were reconstructed to look like a Pentaceratops. The illustration on the right shows the missing parts of the frill (shaded). (Credit: Image courtesy of Yale University)

Newly Discovered Dinosaur Likely Father of Triceratops -- Science Daily

ScienceDaily (Jan. 31, 2011) — Triceratops and Torosaurus have long been considered the kings of the horned dinosaurs. But a new discovery traces the giants' family tree further back in time, when a newly discovered species appears to have reigned long before its more well-known descendants, making it the earliest known member of its family.

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When Did The Dinosaurs Exactly Die Off?

U of A researcher Larry Heaman with the actual fossil that now throws into questions the KT paradigm. He is sitting in front the laser ablation machine. (Credit: Image courtesy of University of Alberta)

Dinosaurs Survived Mass Extinction by 700,000 Years, Fossil Find Suggests -- Science Daily

ScienceDaily (Jan. 27, 2011) — University of Alberta researchers determined that a fossilized dinosaur bone found in New Mexico confounds the long established paradigm that the age of dinosaurs ended between 65.5 and 66 million years ago.

The U of A team, led by Larry Heaman from the Department of Earth and Atmospheric Sciences, determined the femur bone of a hadrosaur as being only 64.8 million years old. That means this particular plant eater was alive about 700,000 years after the mass extinction event many paleontologists believe wiped all non-avian dinosaurs off the face of earth, forever.

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My Comment: More evidence is needed .... but it raises a lot of questions.

No Leftovers for Tyrannosaurus Rex: New Evidence That T. Rex Was Hunter, Not Scavanger

Artist's rendition of Tyrannosaurus rex. (Credit: iStockphoto)

From Science Daily:

ScienceDaily (Jan. 25, 2011) — Tyrannosaurus rex hunted like a lion, rather than regularly scavenging like a hyena, reveals new research published in the journal Proceedings of the Royal Society B.

The findings end a long-running debate about the hunting behaviour of this awesome predator.

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My Comment: I feel hungry already.

Dinosaurs Significantly Taller Than Previously Thought, Research Suggests

Photo: Dinosaur bones have rounded ends with rough surfaces that mark where blood vessels fed large amounts of cartilage in the joint. The cartilage could have added 10 percent or more to the height of a dinosaur. (Credit: Casey Holliday/University of Missouri)

From Science Daily:

ScienceDaily (Oct. 1, 2010) — It might seem obvious that a dinosaur's leg bone connects to the hip bone, but what came between the bones has been less obvious. Now, researchers at the University of Missouri and Ohio University have found that dinosaurs had thick layers of cartilage in their joints, which means they may have been considerably taller than previously thought. The study is being published this week in the journal PLoS ONE (Public Library of Science).

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Dinosaurs Were Taller Than Thought

From Live Science:

As if dinosaurs weren't already giant to begin with, new research indicates they were even taller than was thought.

Although researchers had a good idea how tall dinosaurs stood based on their skeletons, it turns out that parts of their bodies that didn't fossilize might have boosted their height by at least 10 percent.

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Humpback Dinosaur Surprises and Puzzles Experts

Hypothetical reconstruction of the flesh-eating dinosaur Concavenator that lived 125 million years ago shows the animal's humpback and spiky appendages on its forearms that may have been wings. Copyright: Raúl Martín.

From Live Science:

A hunchback dinosaur of sorts once roamed what is now central Spain. The meat-eating beast sported a humplike structure low on its back, a feature never previously described in dinosaurs, and one that has scientists scratching their heads.

The dinosaur, which is being called Concavenator corcovatus, measured nearly 20 feet (6 meters) in length and belonged to a group of some of the largest predatory dinosaurs known to walk the earth — carcharodontosaurs. It lived some 125 million years ago.

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Head-Ramming Dino Had 'Gears' in Skull

A reconstruction of Texacephale langstoni shows how the dinosaur may have used its head. Nicholas Longrich

From The Telegraph:

The new Texas dino featured a skull with a domed top and side bones that may have allowed its skull bones to mesh on impact.

A new species dinosaur found in Texas featured flanges on the side of its skull that may have allowed its skull bones to mesh like gears -- a useful feature when it likely rammed heads with other dinosaurs, say researchers.

"It's possible that this would prevent the skull bones from dislocating under stresses," speculated Nicholas Longrich, a postdoctoral associate in Yale University's Department of Geology and Geophysics who was project leader for a study about the find published in the latest issue of the journal Cretaceous Research.

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Prolonged Climatic Stress Main Reason for Mass Extinction 65 Million Years Ago, Paleontologist Says

According to new research from a German paleontologist, long-term climate fluctuations -- not a giant meteorite impact -- were likely the main reason for the extinction of the dinosaurs and other creatures 65 million years ago. (Credit: iStockphoto/Adrian Chesterman)

From Science Daily:

Science Daily (Mar. 27, 2010) — Long-term climate fluctuations were probably the main reason for the extinction of the dinosaurs and other creatures 65 million years ago. This conclusion was reached by PD Dr. Michael Prauss, paleontologist at Freie Universitaet Berlin, based on his latest research results.

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Tiny Tyrannosaur Came From The Land Down Under

The fossil was uncovered in Dinosaur Cove, Australia. This map shows the location of Dinosaur Cove approximately 110 million years ago. Credit: Roger Benson, University of Cambridge.

From Live Science:

T-rex's relatives might have once roamed in the land Down Under, according to a new study. A pelvic bone uncovered in Australia marks the first evidence that tyrannosaurs could have inhabited the Southern Hemisphere.

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How Dinosaurs Rose To Prominence

Central Atlantic Magmatic Province Massive lava flow (top brown layer) sits atop end-Triassic (white) and Triassic (red) layers at a site in Five Islands Provincial Park, Nova Scotia. (Credit: Jessica. H. Whiteside/Brown University)

From Science Daily:

Science Daily (Mar. 23, 2010) — A shade more than 200 million years ago, the Earth looked far different than it does today. Most land on the planet was consolidated into one continent called Pangea. There was no Atlantic Ocean, and the rulers of the animal world were crurotarsans -- creatures closely related to modern crocodiles.

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How Dinos Ruled The World

This Triassic exhibit at the New Mexico Museum of Natural History and Science helps to illustrate the battle between crocodiles and dinosaurs. Larry O'Hanlon

From Discovery News:

A massive volcanic eruption 200 million years ago tipped the scales in the battle between dinosaurs and crocodiles for global dominance.

Some 200 million years ago, Earth was on the verge of either an age of dinosaurs or an age of crocodiles. It took the largest volcanic eruption in the solar system -- and the loss of half of Earth's plant life -- to tip the scales in the dinos' favor, say researchers.

The idea is not new, but connecting the eruption to a 200-million-year-old mass extinction event has not been easy. Now that link is confirmed in an exhaustive new study published in the latest Proceedings of the National Academy of Sciences.

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Dinosaurs Did Not Gradually Die Out

From Discovery News:

Non-avian dinosaurs became extinct 65 million years ago, and now researchers have proven that this die-off didn't happen over a long period of time.

A detailed look at dinosaur bones, tracks and eggs located at 29 archaeological sites located in the Catalan Pyrenees reveals that there was a large diversity of dinosaur species living there just before the fatal K-T extinction event, which many scientists believe was caused by several large meteors hitting Earth.

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'Dinosaurs' 10 Million Years Older Than Previously Thought

Asilisaurus kongwe from the Middle Triassic of Tanzania, with the sail?backed archosaur Hypselorhachis in the background Photo: Marlene Donnelly/Field Museum

From The Telegraph:

Dinosaurs reign over the earth may date back further than previously thought, a new discovery suggests.

Palaeontologists have found a four-legged ancestor of the prehistoric creatures that hails from 250 million years ago – 10 million years earlier than first thought.

The large dog sized creature, which ate meat and vegetation, is thought to be a similar relation to dinosaurs as chimps are to humans.

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Gulp! Long-Necked Dinosaurs Didn't Bother Chewing

Sauropod dinosaurs like this newly discovered Abydosaurus had heads that were just one two-hundredth of the total body volume. That small size might explain why they didn't chew their food, the researchers say. Credit: Michael Skrepnick.

From Live Science:

A mom's wise words about chewing your food likely got lost on a giant, long-necked dinosaur that lived about 105 million years ago in North America. That's according to analyses of four skulls from a newly identified dinosaur species.

"They didn't chew their food; they just grabbed it and swallowed it," said study team member Brooks Britt, a paleontologist at Brigham Young University.

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