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Size of the largest known (left) and holotype (right) specimens compared to a human. Dilophosaurus was one of the earliest large predatory dinosaurs, a medium-sized theropod, though small compared to some of the later theropods. [2] [5] It was also the largest known land-animal of North America during the Early Jurassic. [6]
One genus of the tangle web spiders has venom which is known to be medically significant. This genus, the widow spiders of genus Latrodectus, has caused human fatalities. The other genus, Steatoda, the false widow spiders, have bites that can cause pain and erythema but only around 30% of bites lead to systemic symptoms. [17]
Spider behavior may be caused by limited human interaction. Spider defense against predators include camouflage, and escape by falling or running. [23] Biting is a last resort and the amount of venom injected varies greatly. Spider venom toxicity can be evaluated in experimental animals, or reported from accidental bites.
The spitting cobra can squirt venom from forward-facing holes in its fangs. [4] It aims for its victim's eyes, spitting up to 1.5 m. The venom may cause blindness. The Mangshan pitviper is also reported to spit venom.
The discovery of human bone fragments sent the researchers digging through the material excavated about nine decades ago — in which they found additional skeleton fragments.
Dilophosaurus is a featured article; it (or a previous version of it) has been identified as one of the best articles produced by the Wikipedia community. Even so, if you can update or improve it, please do so. This article appeared on Wikipedia's Main Page as Today's featured article on June 22, 2018.
Platypus venom is entirely different from other venomous creatures. While more research is needed, scientists believe it contains specific proteins that target the nervous system. Heptapeptide 1 ...
A combination of bone analysis, carbon dating, stable isotope analysis and DNA testing yielded data that "supports the possibility" that the human bones found in 1955 are those of Bishop Thedomir ...