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Baryon acoustic oscillations, an artifact remaining from the Big Bang, can be used by scientists to measure cosmological distances regardless of how the distances are changing. Soon after the Big Bang, the beginning of our universe, all of the matter of the universe was packed densely into a much smaller space. The…

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What comes to mind when you think of crocodiles? You might think of ancient reptiles, or “living fossils,” that have been around, little changed, since the time of dinosaurs. It is true that crocodile-like species (Pseudosuchia) have been around since the Early Triassic. In fact, they were once the dominant…