Narwhal tusks expose climate change
Like rings in a tree trunk, narwal tusks have growth rings that give us a window into changing conditions in the Arctic climate.
Read MoreLike rings in a tree trunk, narwal tusks have growth rings that give us a window into changing conditions in the Arctic climate.
Read MoreIn medieval times, the narwhal tusk was bought and sold as a “unicorn horn.” It is actually a very long tooth, but it is still very cool. By Mark Lasbury, PhD Zootopia opened in movie theaters on March 4, 2016. Among all the animals featured in this feature, you probably recall a few sporting horns. But did you happen to spot any unicorns? Mythical Unicorns The earliest writings that describe unicorns were those of the Greek writer Ctesias, in the late fifth century BCE. He described the Indian ass, an…
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