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6327 |
duddy |
9 years ago |
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8756 |
duddy |
8 years ago |
World's cleanest bacteria
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A bacterium previously unknown to science was found in two spacecraft clean rooms, one in Florida and the other in Guiana. Space agencies use these rooms to prepare spacecraft for launch and are considered two of the most sterile places on Earth.
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5739 |
duddy |
10 years ago |
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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5396 |
duddy |
8 years ago |
What happens when all the oil (petroleum) is used up?
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Peter Diamandis makes a case for optimism -- that we'll invent, innovate and create ways to solve the challenges that loom over us. "I'm not saying we don't have our set of problems; we surely do. But ultimately, we knock them down."
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2 |
5660 |
duddy |
10 years ago |
Two new gigantic viruses
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Have you heard about two new gigantic viruses that have been discovered? They measure around 1 micrometer long & half that across – larger than some eukaryotic cells! Massive genomes up to 2.5 Mb (millions of base pairs) are present to match their giant size. Their discovery raises many questions on viral diversity that remains unexplored.
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2250 |
duddy |
10 years ago |
The Science Behind Fasting and Bad Breath
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Fasting is a practice that has been followed by various cultures and religions for centuries. It involves abstaining from food and, in some cases, beverages for a defined period. While fasting can have several physical and mental benefits, it is not uncommon for individuals to notice an unpleasant odor in their breath during fasting periods. Let's explore the reasons behind this phenomenon and uncover the science behind why one's breath may smell when they've fasted. When we fast or restrict our carbohydrate intake for an extended period, our body undergoes a metabolic state called ketosis. During ketosis, the body shifts its primary source of energy from glucose (derived from carbohydrates) to ketones, which are produced when the liver brea ...
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1779 |
bio_man |
9 months ago |
The glue of the future, today
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Before I begin telling you about this fascinating new glue (adhesive), there's a thing or two you need to know about the animal that inspired it all, the gecko. Geckos are small lizards that have the ability to run up walls and scurry across ceilings with the help of tiny rows of hairs on their feet known as setae. Setae generate a multitude of weak attractions (called Van der Waals forces) between molecules on the two surfaces that add up to a secure foothold. Unlike glue or tape, a gecko’s sticky feet attach and detach effortlessly, which made it a perfect case study for engineers to model. To create their artificial gecko adhesive, a Stanford team of scientists started by making silicone micro-wedges, which imitated gecko hair. They asse ...
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18574 |
duddy |
8 years ago |
Speedy bacteria
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Bdellovibrio bacteriovorus is a bacterium that attacks other bacteria. It can charge its prey at speeds of up to 100 micrometers per second, comparable to a human running 600 kilometers per hour. It then bores into its hapless victim by spinning at 100 revolutions per second. Most bacteria aren't quite that fast, but they can move by whipping flagella or by spiraling through their environment. ...
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14254 |
duddy |
8 years ago |
Radioactive bacteria
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Listeria bacteria has been enlisted by researchers to selectively infect metastatic pancreatic cancer cells and deliver radioisotopes into them. The experimental treatment dramatically decreased the number of metastases (cancers that have spread to other parts of the body) in a mouse model of highly aggressive pancreatic cancer without harming healthy tissue. Mice livers are shown above. The saline control liver on the left presents a large number of metastases compared to the liver on the right which was subject to the radioactive Listeria treatment. ...
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3152 |
duddy |
11 years ago |
It's no wonder this species was so hard to find
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Biologists from James Cook University have discovered a new species of leaf-tailed gecko in Australia. The lizard is highly camouflaged against the granite boulders it lives on and grows to around 12 cm. It's been named the Cape Melville leaf-tailed gecko ( Saltaurius eximius) after the region in northern Queensland where it was found.
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6440 |
duddy |
10 years ago |
High school is done… now what?
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Millions of new high school graduates will soon be heading to college. Here are five tips for the summer ahead. Cue the Pomp and Circumstance.For most high school seniors, it's that time of year – the time when funny hats are thrown into the air to signal the end of sheltered bubbles and parental control, and the beginning of the path to expanded horizons. But if you were like me, the standard graduation song that everyone hears takes a back seat to your soon-to-be fight song that makes you distinct. Before you can step foot onto the college campus of your choice, however, you must spend three months in educational limbo. Sure, you'll be working, possibly taking a summer class or two and enjoying your weekends (be careful, kids), but through ...
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1477 |
bio_man |
6 years ago |
Evolution is sneaky
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While this little guy may look like some sort of 'Hummingbee' it's actually a Bee Fly. They sneak their eggs into beehives, where their larvae can parasitize bee larvae and eat their food reserves!
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4739 |
duddy |
9 years ago |