As temperatures drop and autumn gives way to the seemingly ceaseless snows of winter, some animals in northerly climes exchange their pelage or plumage of summer drab for the purest white. Unlike many white animals associated with the north, such as polar bears and snowy owls, which are white all year, these creatures shift their colors with the seasons. Why this happens is not entirely clear. While camouflage is one evolutionary factor that has selected for seasonally white fur, it is likely that the switch to winter whites confers other advantages as well. Scientists believe that if staying hidden were the only upside, many more snow dwellers would be white, but that is not the case. In fact, most Arctic animals do not change color with the seasons at all, even species closely related to those that do. One theory is that a pale coat may have better insulating properties—because melanin, the substance responsible for colored hair, is absent from white fur, leaving air spaces in the hair shaft.
Username: Shopno Published on 2024-12-05 02:30:58 ID NUMBER: 125988
In movies, T. rex always has a ferocious roar. Did it in real life too? No one knows for sure. But scientists can study the closest living relatives of T. rex , crocodiles and birds, for clues. And a giant animal like T. rex would have made lower-pitched sounds than smaller animals. So scientists study large living animals for clues too!
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Africa's Safari Animals and Where to Find Them
The word "Africa" is an evocative one that usually goes hand-in-hand with mental images of vast savanna plains dotted with exotic game. The majority of overseas visitors to Africa will go on safari and, in doing so, discover that there is nothing more magical than a close encounter with the continent's incredible wildlife. Most of the species one sees on safari are unique to Africa, and many of them are instantly recognizable. In this article, we look at 15 of the continent's most iconic animals, including those that make up the African Big Five.
Sea otters are native to the Northern coast of the Pacific Ocean. About 90% of the world’s sea otters live in Alaska. It has a small, round face with a large nose and eyes and a tendency to float on its back in an adorable position, which makes them some of the cutest animals in the world. Even though their cuteness has a lot to do with their features, it is their demeanor which is most attractive to people. Sea otters regularly hold each other’s hands while they sleep. This is a survival mechanism that keeps them together so they don’t drift apart, but for humans, this is just an adorable behavior on display. Sea otters are overloaded with cuteness!
The hedgehog is a round and spiny forager native to Africa. They can be wonderful pets, but they are nocturnal and often sleep a lot during the day. They tend to get frightened very easily and will roll up into a prickly ball when startled. Despite their sharp quills, these low-maintenance cuties have gained a lot of popularity as pets. Hedgehogs are cute, delightful, and quiet animals. Due to their spines, hedgehogs aren’t very cuddly animals. However, they are very friendly and lively pets. They are very social, especially if they’re handled regularly from a young age. It is undoubtedly one of the cutest animals on earth.
Quokka are small marsupials who belong to the same family as kangaroos and wallabies, native to southwestern Australia. Quokkas are herbivores who primarily feed at night, in the sense they are mainly nocturnal. It is also known as the short-tailed scrub wallaby. They are widely known for their distinct facial expressions and it looks like they’re saying cheese when they pose for their fans from across the world! Quokkas are very much loved for their expressions for which they are also known as the happiest animals in the world. If you’re in need of an instant smile then just Google “quokka selfies.” But while they are uncontrollably cute, they shouldn’t be interacted with in the wild, because they are currently listed as endangered and are in need of protection.
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