Thousands of dinosaur footprints have been found on a steep mountain slope in Denali National Park in Alaska. These are not the first dinosaur tracks to be found in Denali but the size of the tracksite - at least 500 by 150 feet - and the exceptional preservation of the tracks makes this a notable... Continue Reading →
What do you think of when someone mentions the Jurassic or Cretaceous ages? Most likely you will immediately think of dinosaurs and other large reptiles such as pterosaurs. Maybe you think of the movie Jurassic Park, filled with dinosaurs and lush vegetation. This time has become known as the Age of the Reptiles and aptly so since... Continue Reading →
Everyone has encountered a T. rex in books, movies or museums. Besides its size and menacing jaws one of the most striking features of a T. rex is its diminutive arms. So why were the arms of T. rex so short? There have been many hypotheses including: 1) they had no use and... Continue Reading →
We live in a new golden age of fossil discoveries. It seems that every week a new and dramatic fossil find is revealed. This fossil renaissance can be attributed to the opening up of new fossil sources, particularly China and Mongolia but also South America and to improved technology for retrieving and analyzing fossil remains.... Continue Reading →
A mummified fossil of common species of hadrosaur was found recently in South Dakota that showed that this particular hadrosaur had a rooster-like fleshy comb on its head. Many hadrosaurs have exotic extensions of their cranial bones but this evidence that even the “boring” hadrosaurs had fleshy projections suggests that the hadrosaurs were an even... Continue Reading →
What museum can you go to where you can see real dinosaur bones, you don't pay any fees, you can touch all the exhibits and there are no security cameras watching your every move (at least I don't think there are:-)? The answer is The Mill Canyon Dinosaur Trail near Moab, Utah. This outdoor "museum"... Continue Reading →
Yep, dinosaurs are known by more than just their bones. I have been reading quite a few research papers about dinosaurs as I prepare to write a long set of posts about Dr. Schweitzer and the significance of soft-tissue preservation in dinosaur bones. During this reading I got distracted by a discussion about dinosaur coprolites... Continue Reading →
Everyone has encountered a T. rex in books, movies or museums. Besides its size and menacing jaws one of the most striking features of a T. rex is its diminutive arms. So why were the arms of T. rex so short? There have been many hypotheses including: 1) they had no use and... Continue Reading →
Dinosaur eggs are surprisingly (to the non-biologist) similar in size. Even the very largest dinosaurs laid eggs that were hardly any bigger than the largest eggs found today. These are observations from the fossil record and these observation make sense biologically even though all we see are fossilized eggs. Eggs are limited in the size they attain for several reasons but one of the most important is that the embryos in the eggs must have oxygen to grow.
This is a follow-up to my previous post on the 15 juvenile dinosaur fossils found in a nest. In that post I mentioned one of the explanations by flood geologists (ie. young earth creationists) for the presence of fossilized dinosaur eggs in the fossil record is that dinosaurs somehow escaped the initial stages of... Continue Reading →
Another remarkable fossils find has been reported in the past few days. This involves 15 complete or nearly complete fossils of juvenile dinosaurs all preserved in what is apparently a large 2-3 foot wide nest. I have obtained the original journal article that described this fossil find in detail. The paper "A nest... Continue Reading →
This is part of a continuing a series of posts on John Ray's correspondences. Quotes are from the publication of Ray’s letters (Further Correspondence of John Ray) edited by Robert W. T. Gunther and printed for the Ray Society in 1928. The first is from a letter to Mr. Edward Llwyd at the Museum of... Continue Reading →
Naturalis Historia 