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Why can't chimps walk upright?
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What can we learn from chimps swinging their hips? In this Nature Video, the walking style of our primate cousins are investigated, and we see what they can teach us about our ambling ancestors.
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5394 |
duddy |
8 years ago |
Homosexuality is not a choice
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Scientists have discovered evidence that homosexuality is not a lifestyle choice, but rather is rooted in a person’s biology. While specific genes have not been found, a male twin study reveals that homosexuality may be caused by chemical modifications that alter gene activity. As the fetus develops, certain genes get turned on or off depending the chemicals the fetus is exposed to. These chemicals don't necessarily have to be chemicals ingested or inhaled by the mother, but could be an imbalance in a hormone, such as testosterone. As adults, genes can also activate and deactivated based on our environment. More research is needed, but scientists stress that these findings shouldn’t be used to produce tests for homosexuality or a misguid ...
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3330 |
duddy |
8 years ago |
Leaves are packed with chlorophyll
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Did you know that there are about half a million chloroplasts (the organelle in plant cells responsible for photosynthesis) in a square millimeter surface area of a leaf! And if that's not enough, photosynthesis makes an estimated 160 billion tonnes of carbohydrates per year. No other chemical process on Earth can match the output of photosynthesis.
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23956 |
duddy |
8 years ago |
Ever seen a hairy rhinoceros?
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Sumatran rhinoceroses are believed to be the oldest surviving rhino species - and the closest surviving relative of woolly rhinos, which died off 10 000 years ago. Apart from being the smallest rhino, they're completely covered in hair (shown above), especially the young ones. Their hair is very soft and they also sound like humpback whales when you hear them, making them incredibly cute.
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15593 |
duddy |
8 years ago |
This flower stinks
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The corpse flower ( Amorphophallus titanium) is one of the world's stinkiest plants. What makes it smell so bad? Analyses of chemicals released by the plant show the "stench" includes dimethyl trisulfide, dimethyl disulfide, trimethylamine (rotting fish), isovaleric acid (sweaty socks), benzyl alcohol (sweet floral scent), phenol (like Chloraseptic), and indole (like mothballs). While this may be foul smelling to humans, to dung beetles and flies, it smells like opportunity. Insects which feed on dead animals or lay their eggs in rotting meat are attracted to the sent, therefore the smell invite pollinators and scares away humans at the same time. ...
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15583 |
duddy |
8 years ago |
How one perceives beauty is merely superficial
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Beauty may be in the eye of the beholder, but what’s influencing our eye? Scientists reveal that it’s not genetics but life experiences that lead us to find one face more attractive than another. This finding furthers the on-going debate of nature versus nurture. Here's how the study went down: Researchers asked 547 pairs of identical twins and 214 pairs of same-gender fraternal twins to view 200 faces and rate them on a scale of one to seven, with one being the least attractive and seven the most attractive. A group of 660 non-twins then completed the same survey. If genes were more involved in facial preference, identical twins would have had similar ratings; if the influence of a familial environment carried more weight, fraternal twins w ...
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15628 |
duddy |
8 years ago |
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