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Did Teeth First Evolve as Sensory Tissue?
One of the mysteries of evolution (there are so many) is the origin of teeth.
The past few years have witnessed a remarkable flurry of research on the origin or origins of vertebrate teeth. While this work is progressing, the details of when, where, why, and how teeth first appeared still elude consensus. Indeed, there is not even agreement on the fundamentals, such as how we define a tooth.1
More...''The Flood of Death'': A Mass Dino Grave in Canada
Paleontologists in Alberta, Canada, have recently unearthed “a mass grave on a monumental scale.”1 The BBC story speaks of
Thousands of dinosaurs [that] were buried here, killed in an instant on a day of utter devastation.
Now, a group of palaeontologists have come to Pipestone Creek - appropriately nicknamed the “River of Death” - to help solve a 72-million-year-old enigma: how did they die?1
More...Bone, Skin, Claw Lasted…150 Million Years?
Experts and educators have long assumed Archaeopteryx represents a transition from theropod dinosaurs to modern birds. All of this speculation depends on the fossils having been deposited many millions of years ago. But a newly described Chicago specimen—the fourteenth known Archaeopteryx—seems to have preserved original body tissues that would deflate its assumed old age and thus the evolutionary tales that require all those supposed years.
More...How Did Earth Get Its Water?
Earth’s oceans contain 321 million cubic miles (1.335 billion cubic kilometers) of water. The moon causes ebb and flow of tides twice in a 24-hour period, while the wind, density variations, and tides contribute to the massive ocean currents. These currents prevent oceanic stagnation and help circulate vital moisture and heat around the globe. But where did all this water come from?
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