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Developing immunity to the common cold
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Summer is officially over, and fall has arrived. With this season comes runny noses and doctor visits. Save yourself the time and money, because it's either the common cold or the flu, both of which have no cure other than to rest and endure the discomfort. Luckily, you can be immunized for the flu, but not the cold. In fact, many people battle the cold several times a year, rather than developing a natural immunity towards it, why is that? The primary reason that immunity generally does not develop against the common cold is that there is not a single cause of the disease. Over 200 serotypes of viruses, including enteroviruses (previously called rhinoviruses), coronaviruses, and adenoviruses, can cause the symptoms of the common cold. Ther ...
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22583 |
bio_man |
4 years ago |
Shivering bees
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Unlike most bees, which hibernate during colder months, honey bees remain active all winter long despite the freezing temperatures. A honey bee colony’s ability to survive the winter depends on their food stores of honey. Once the colony begins to run out of honey, the worker bees force the useless drones from the hive, to maintain the food store. As temperatures drop, the honey bee workers form a cluster around the queen and brood, keeping them warm. Bees on the inside of the cluster can feed on the stored honey. If surrounding temperatures rise, the bees on the outside of the group separate a bit, to allow more air flow. As temperatures fall, the cluster tightens, and the outer bees pull together. As it gets colder, the worker bees actively ...
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8399 |
duddy |
8 years ago |
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4 |
5790 |
duddy |
9 years ago |
A carefree seal
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Meet the ribbon seal, native to the icy waters off the southern coast of Russia. With no confirmed predators (except humans who occasionally hunt them), these seals are known for being super relaxed, and will let you walk right up to them on the ice floes.
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1617 |
duddy |
10 years ago |
Snow tunnel found in Russia
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This snow tunnel near the Mutnovsky Volcano in Russia is almost a kilometre long. These tunnels form under the snow fields in deep ravines at the end of the summer thaw. Meltwater flows through glaciers towards lower elevations, finding an outlet at the terminus of the glacier and carving the ice on the way. The Mutnovsky Volcano is found in the southern part of the Kamchatka Peninsula.
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3167 |
duddy |
11 years ago |
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