Bones can tell you a lot about a creature, but there's much more they can't tell you. Bones are not behavior. We know what the skeletons of dinosaurs looked like. But there's a great deal about their appearance and behavior that we can only guess at.
Sometimes, though, bones can surprise you. Sometimes, they carry secrets locked inside. At Not Exactly Rocket Science, Ed Yong writes about a new study that's uncovered evidence about dinosaur behavior, using information stored in the dinosaurs' teeth. The paper suggests that the North American Camarasaurus had a seasonal migration.
Reptiles replace their teeth throughout their lives and the dinosaurs would have been no different. Whenever they drank, they incorporated oxygen atoms from the water into the enamel of their growing teeth. Different bodies of water contain different mixes of oxygen isotopes, and the dinosaurs’ enamel records a history of these blends. They were what they drank.
It’s easy enough to measure the levels of oxygen isotopes in dinosaur teeth, but you need something to compare that against. How could anyone possibly discern the levels of such isotopes in bodies of water that existed millions of years ago? Local rocks provide the answer. The oxygen also fuelled the growth of minerals like calcium carbonate (limestone), which preserve these ancient atoms just as dinosaur teeth do. If dinosaur enamel contains a different blend of oxygen to the surrounding carbonates, the place where the animal drank must be somewhere different from the place where it died.
Palaeontologists have used oxygen isotopes to infer all manner of dinosaur traits, from the fish-eating habits of spinosaurs to the hot body temperatures of sauropods to the chilly conditions endured by Chinese dinosaurs. These atoms have acted as menus and thermometers. Now, Fricke has turned them into maps.
Timothy writes, “Diego Gómez is a Colombian conservation biologist. When he was a college student, he shared a single research paper online so that others could read and learn from it, just as he did. Diego was criminally prosecuted for copyright infringement, and faced up to 8 years in prison.”
Sometimes, in the course of his work, University of Florida molecular geneticist Martin Cohn must travel with unusual items like a 3D-printed mouse penis. Similarly, University of Massachusetts biologist Diane Kelly totes around anatomical models like a mold of a dolphin vagina. They’re not alone in the odd science-related items they must fly with, from […]
Rod McCullom at Undark has a terrific overview of the perpetual “virtual lineup,” where half of all American adults “are enrolled in unregulated facial recognition networks used by state and local law enforcement agencies.”
Boasting an IPX6 waterproof rating, the Trakk Bullet Ultra Compact Waterproof Bluetooth Speaker resists dust and heavy rainfall. It’s currently available in the Boing Boing Store.The Trakk Bullet offers the same wireless convenience as other portable speakers, but few are built as tough as this one. Its utilitarian construction is designed to be a totally low-maintenance […]
The Ticwatch 2 Active Smartwatch is a simpler take on an active wearable that raised over $2m dollars on Kickstarter and is currently offered in the Boing Boing Store.Somewhere in between the single-day battery life and platform-specificity of the Apple Watch and Android Wear devices, there exists the Ticwatch. Instead of trying to shoehorn another […]
Loot Crate is a subscription service that delivers a box of curated pop culture goods to your doorstep. To sample their geeky wares, you can order a single mystery box exclusively from the Boing Boing Store.Each month Loot Crate sends you 6-7 unique items and apparel, including collectibles, books, and t-shirts. Pulling inspiration from all […]