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dinosaur

Statistics shine light on T. rex family tree

Tyrannosaurus rex is one of the most recognizable dinosaurs, but the tyrannosauroid family tree is also occupied by many lesser-known cousins — such as Xiongguanlong and Lythronax — along with some large holes. Now, researchers have produced a new phylogenetic family tree including all of the known tyrannosauroid species that highlights the largest remaining gaps and provides clues as to how they might be filled.

22 Jun 2016

Fossil dinosaur illuminates evolution of tyrannosauroid body sizes

Tyrannosauroid dinosaurs were the dominant predators of the terrestrial ecosystems in which they roamed for much of the Late Cretaceous, from about 80 million to 66 million years ago. Some, like Tyrannosaurus rex, reached lengths up to about 13 meters and heights of nearly 4 meters. Their large size and keen senses — relatively large nasal passageways suggest a heightened sense of smell — are considered to have been keys to their success.

 
22 Jun 2016

Benchmarks: May 12, 1905: Andrew Carnegie donates 'Dippy the Dino'

As one of the world’s wealthiest philanthropists, Andrew Carnegie had come to expect that people would praise and honor him, but May 12, 1905, would be an unusual day for the Pittsburgh steel magnate. Never before had he been honored for donating a dinosaur. Carnegie’s contribution of a massive plaster model of a Diplodocus — at the time the largest-known animal to have ever trod the planet — to London’s Natural History Museum was part of the Scotsman’s dream to rid the world of war, which he called “the foulest blot upon our civilization.”

12 May 2016

Travels in Geology: Discovering Denver's dinosaurs

A rich paleontological legacy makes Denver, Colo., one of the best places in the world to learn about dinosaurs, with numerous fossils and trackways at sites nearby.

04 May 2016

Getting there and getting around Denver

Denver International Airport is the best arrival point for exploring Denver and the surrounding area. A car is necessary to see many of the attractions described here. If you fly in, you can rent a vehicle at the airport or take the new light rail into town and rent a car as needed. Although all of these sites are open year-round, snow sometimes obscures the tracks during winter and early spring, and trails can be muddy. May through October is an ideal time to visit the region.

04 May 2016

Making tracks through the Dinosaur Diamond

The Dinosaur Diamond scenic byway is an 824-kilometer-long dinosaur fossil- and trackway-sightseeing extravaganza. Follow the route through Utah and Colorado to traverse the Late Triassic through the Cretaceous.

18 Apr 2016

Museums and exhibits in the Dinosaur Diamond

All around the Dinosaur Diamond area there are exiting museums and exhibits highlighting the area's rich paleontological history.

18 Apr 2016

Volcanic aerosols not enough to cause mass extinctions?

Mass extinctions — when more than half of Earth’s species disappear in a geologic instant — offer some of the planet’s most perplexing unsolved mysteries. Prolonged periods of volcanic activity have long been prime suspects for these ancient whodunits, the most recent of which finished off the last nonavian dinosaurs at the close of the Cretaceous about 66 million years ago. But scientists debate how drastic the environmental effects of such volcanism might have been, and whether other factors — like asteroid impacts, as in the end-Cretaceous extinction — played a big role as well.

25 Feb 2016

A jaw all the wider to bite you with

Tyrannosaurus rex  is often depicted with its fearsome jaws wide open, but few studies have looked at how wide the Cretaceous predator’s gape could actually be.

23 Feb 2016

Ancient eggshells may reveal dinosaur body temperatures

Whether dinosaurs had metabolisms more like slow, cold-blooded reptilians or fast, warm-blooded birds has long been a mystery. Fossilized bones, which don’t preserve the delicate cell membranes that facilitate heat production in warm-blooded animals, are not likely to answer the question. Fossilized eggshells, however, might be just the ticket to determining the past body temperatures of egg-laying females, which, scientists say, might help address whether the dinosaurs’ metabolisms were warm or cold.
 
27 Jan 2016

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