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First human-made object to land on another planet
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The Soviet-built space probe, Venera 3, was the first spacecraft to ever land on another planet back on March 1 st, 1966, after being launched on November 16, 1965 from Baikonur, Kazakhstan. The mission of this spacecraft was to land on the Venusian surface. The entry body contained a radio communication system, scientific instruments, electrical power sources, and medallions bearing the State Coat of Arms of the U.S.S.R. Unfortunately, the probe crash-landed on Venus, causing its communication systems to fail before it could return any information about the planet. The spacecraft impacted on the night side of Venus, near the terminator, around -20º to 20º N, 60º to 80º E. The Venera program, however, would go on to successfully submit data f ...
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2613 |
bio_man |
7 years ago |
Ming the Clam
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Ming the Clam, once the world's oldest animal, was killed at 507 years of age by scientists trying to determine its age in 2006.Ming the Clam (1499–2006) is a nickname given to a specimen of the ocean quahog clam ( Arctica islandica), that was excavated off the coast of Iceland in 2006 and whose age was calculated by counting annual growth lines in the shell. Ming was the oldest individual animal ever discovered whose age could be accurately determined. The mollusc’s 507 year old life came to an end in 2006 when the British researchers – unaware of the animal’s impressive age – opened up its shell to examine it. The clam was named Ming in reference to the Ming dynasty, during which it was born. Interestingly, the second oldest ocean quahog ...
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2515 |
bio_man |
7 years ago |
Which one is healthier: dark, milk, or white chocolate?
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We've all heard by now that dark chocolate is the healthier chocolate, while white chocolate lacks behind in essential nutrients. Let's break down what's myth and what's real so you know exactly what's good for you next time you treat yourself to one of these snacks. First, a discussion on cocoa.Cocoa – chocolate's main raw ingredient – naturally contains polyphenols, namely flavan-3-ols and flavonoids, which are antioxidants constantly being studied for their potential effects in the body. The following table shows the content of phenolics and flavonoids in the three different types of chocolate. Generally, the more antioxidants you consume, the more protection your body will have from the formation of free radicals, which are unstable mol ...
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1767 |
bio_man |
7 years ago |
Chicken egg colours explained
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It's a common knowledge that different breeds of chickens lay different colored eggs. Here I'll explain what chemicals and conditions give rise to these differences. White eggsAll eggshells are made of calcium carbonate and the white ones have no pigment added.Brown eggsThe brown colour is caused by protoporphyrin IX, from the hen's haemoglobin, and is coated on the outside of the egg as it moves through the oviduct.Blue eggsBlue eggshells have the pigment oocyanin, which does permeate the shell, so the blue coloring will be all the way through.Green eggsIf a brown layer and a blue layer are crossbred, chances are you will get a green egg when the protoporphyrin IX layer is deposited over the blue oocyanin shell.Pink eggsThe pinkish tint ...
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1660 |
bio_man |
7 years ago |
Is Nutella even healthy?
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 Imagine blending modified palm oil, skim milk powder, cocoa, hazelnuts, and whole lot of sugar – that's how Nutella is technically made. In fact, Nutella contains 10.4 percent of saturated fat and 58% of processed sugar by weight. A two-tablespoon (37-gram) serving of Nutella contains 200 calories, including 99 calories from 11 grams of fat (3.5 g of which are saturated) and 80 calories from 21 grams of sugar. The spread also contains 15 mg of sodium and 2 g of protein per serving. You're probably thinking, what if I gather up these ingredients and do it myself, will I have homemade chocolate spread? Not quite. Nutella uses modified palm oil rather than regular vegetable oil because it remains solid at room temperature. This modified oil i ...
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1587 |
bio_man |
7 years ago |
These bite-size fruits look like tiny watermelons
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Melothria scabra is a species of cucurbitaceous vine grown for its edible fruit, known as cucamelon. Cucamelons are about the size of grapes and taste like cucumbers, they are notable for their sour aftertaste that comes from the skin. The M. scabra plant is native to Mexico and Central America, where it is called sandíita (little watermelon). It is believed to have been a domesticated crop before western contact began. If you happen to get your hands on these tiny melons, apparently they are terrific in stir-fries; they can be pickled just like French gherkins, eaten raw in salads or put up like Polish dill pickles. They also can be chopped and added to salsas for extra texture and flavor. ...
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1330 |
bio_man |
7 years ago |
Why do we hiccup?
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A hiccup is an involuntary spasm of the diaphragm that typically repeats several times a minute. The sudden rush of air into the lungs that's created by each spasm causes the glottis to close, creating the "hic" noise. A bout of hiccups generally resolves by itself, although many home remedies are in circulation to shorten the duration. The medical term for hiccuping is singultus. While many cases develop spontaneously, hiccups are known to develop often in specific situations, such as eating too quickly, taking a cold drink while eating a hot meal, eating very hot or spicy food, laughing vigorously or coughing, or drinking an excess of an alcoholic beverage. Hiccups may be caused by pressure to the phrenic nerve (located in the neck regi ...
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1311 |
bio_man |
7 years ago |
Are you a 'supertaster'?
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A supertaster is a individual who lives in a more intense taste world because they have up to twice as many taste buds than the average person. Among individuals of European descent, it is estimated that about 25% of the population are supertasters. The evolutionary advantage to supertasting is unclear. In some environments, heightened taste response, particularly to bitter plant alkaloids, would represent an important advantage. However, other environments, increased response to bitter may have limited the range palatable goods. In our modern energy rich environment, supertasting may be cardioprotective, due to decreased liking and intake of fat, but may increase cancer risk via deceased vegetable intake. It may be a cause of picky eating ...
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1636 |
bio_man |
7 years ago |
Praying mantises are the only invertebrates known to see in 3D
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Any animal capable of seeing in 3D, such as humans, have the ability to visually perceive depth. No other insect but the Praying mantis is capable of this. Because of this, this predatory insect excels at detecting prey that comes within striking distance, but unlike us, their depth perception only works when the prey is moving. In a new study, scientists glued the world’s tiniest 3D glasses (above, left) on 20 praying mantises ( Sphodromantis lineola) and showed them a series of movies depicting patches of moving dots that were camouflaged against a matching background, and which are perceived as potential prey items to the insect. The insects tried to catch these dots that appeared to be within 2.5 centimeters of their perch. And they coul ...
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1418 |
bio_man |
7 years ago |
Love 'em or Leave 'em?
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February is upon us. Gone are the freshly printed syllabi and daydreams of perfect scores. It's February, and that exciting back-to-school feeling has probably worn away. Not to say that school isn't still exciting. I'm sure that for some of you, the daily routine of tasks and tests is just lovely. But I'd venture to say that many of you — most of you — have had to deal with the most dreaded assignment of all, a sure sign that fun and games are over: the group project. Teachers assign group projects for a number of reasons. For one, it's less assignments that they have to grade, an important consideration when class sizes at large universities are in the triple digits. But the motivation to assign group projects cannot be purely selfish on th ...
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3736 |
bio_man |
7 years ago |
One of the world's largest insects
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If you're not an insect lover, this is your final chance to turn your head!The giant Malaysian katydid ( Macrolyristes corporalis) is one of the largest insects in the world, with their bodies growing to 15 cm (6 inches) long with a 25 cm (10 inch) long wingspan. Though the last thing you want to hear is that this giant insect is carnivorous, they pose absolutely no threat to humans (aside from haunting your dreams, of course). Relatively speaking, the males of this species have the largest testes of any known animal at 14% of their body weight. If humans had the same ratio, a 91 kg (200 lb) man would have testes that weighed nearly 13 kg (28 pounds)! ...
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1370 |
bio_man |
7 years ago |
First ever exoplanets discovered outside our galaxy
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Using a technique known as gravitational microlensing, Oklahoma University astrophysicists were able to detect several exoplanets within a quasar 6 billion light-years away called RX J1131-1231 (depicted in the illustration above, left). Their research shows that the planets range in size from masses as small as the Moon to ones as great as Jupiter. The idea behind this technique is derived from the Einstein's theory of general relativity. Since light waves bend when they pass through space warped by a large gravitational presence, a planet passing in front of a star can act as a lens to focus the light, creating a temporary sharp increase in a star’s brightness, and changing the apparent position of the star. Currently, it's the only known ...
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1289 |
bio_man |
7 years ago |
Can you spot the camouflaged frogmouth bird?
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The frogmouths are a group of nocturnal birds found from across India and southern Asia to Australia. They are named for their large flattened hooked bills and huge frog-like gape, which they use to take insects. The one's shown above are tawny frogmouths, and they exhibits one of the best examples of cryptic plumage and mimicry, which perch low on tree branches during the day camouflaged as part of the tree. Their silvery-grey plumage patterned with white, black, and brown streaks and spots allows them to freeze into the form of a broken tree branch and become practically invisible in broad daylight. The tawny frogmouth often chooses a broken part of a tree branch and perches upon it with its head thrust upwards at an acute angle using it ...
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1224 |
bio_man |
7 years ago |
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