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They might look like a bunch of rocks, but scientists say this is the oldest-ever collection of hand axes, picks and other cutting tools used mainly by our ancient human cousins, Homo erectus. A new analysis of the stone tools show they are 1.76 million years old about 350,000 years older than previous estimates. That means the tools, which are classified as Acheulean, co-existed with more primitive tools known as Oldawan scientists previously thought they didn ;t overlap. But ancient humans didn ;t drop the old technology like it was an iPhone 3 they were seemingly slow ado stanley cup pters. A group of French archaeologists originally uncovered the tools in the 1990s near Kenya Lake Turkana wher stanley cup e Turkana Boy, a 1.6 million year-old skeleton of an 8-year-old boy, was discovered in 1984. More primitive Oldawan tools, which are 2.6 to 1.7 million years old, were also found in the Lake Turkana location. The new dating indicates that the Acheulean and Oldawan tools were in use simultaneously probably by a different human species . But it not clear whether Homo erectus brought the Acheulean tools to the Lake Turkana location from someplace else, or whether they were developed in that location side by side with the Oldawan implements. In either case, ancient humans didn ;t wait in line to get their hands on the new tech. The transition was surprisingly slow, according to Ian Tattersall, a a paleoanthropologist at the stanley quencher American Museum o Oovl The Avengers Trailer Is Full of Explosions and Iron Man and Awesome and The Hulk
If you ;ve always wondered how Tyrannosaurs Rex ate the horned monstrosity that was a Triceratops, you need puzzle no longer. Scientists have finally pieced together how they did it鈥攁nd it was surprisingly straightforward. Nature reports that researchers from the Museum of the Rockies in Bozeman, Mon stanley thermos tana, have analyzed a heap of bite-scarred Triceratops bones stanley quencher to come up with the new theory, which explains how T. Rex went about devouring the dinosaur. They ;ve established four major steps, but the overall approach was a gruesome one: the easiest way to do this was to pull the head off, explained lead researcher Denver Fowler to N stanley cups uk ature. But, hey, let get down to business. Nature has synthesized the major steps, which correspond to the diagrams above: 1. Get a good grip on the neck frill. 2. Tear the head off to expose the tasty neck muscles. 3. Nibble on the soft flesh of Triceratops ; face. 4. Feast on the delicacies beneath the frill. Easy! In fact, the whole exercise suggests that T. Rex was actually far more delicate than Jurassic Park may have us believe. There a restraint involved in eating a Triceratops like this. Kind of. [Nature] Image by mcdittex under Creative Commons license dinosaursScienceT. rexTyrannosaurus Rex |
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发表于 2024-12-12 21:34:59
发表于 2024-12-12 21:35:56
