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- Major twister hits Oklahoma: Its speed, which largely determines the damage it causes, is still unknown
- Why a tornado forms: Tornadoes start with a thunderstorm. But they also require other ingredients, such as instability.
- A mind for math: A part of the brain associated with making memories may also predict success in learning math
Paleontologists have unearthed the remains of Tiktaalik, a creature that lived during the 9-million-year gap between the first known land vertebrates and the lobe-finned fish that preceded them. Analyses of these fossils, as well as those of other early tetrapods, are yielding insights about how the earliest land vertebrates got around.
Credit: Shawn Gould © 2006 National Geographic
Found in: Paleontology
Found in: Paleontology
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