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How to check for dead batteries
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![](https://biology-forums.com/gallery/47/4_24_01_15_3_08_43.png) Dead or depleted batteries, especially cylindrical ones like AA or AAA batteries, can exhibit a unique behavior known as "bouncing" when dropped from a short height. This phenomenon is primarily due to changes in the battery's internal chemistry and physical properties as it becomes discharged. Inside a battery, there are chemical reactions that generate electrical energy. As a battery discharges and its chemical energy is depleted, its internal chemistry changes. One of the changes that occur is a reduction in the pressure of gases within the battery. This decrease in gas pressure can make the battery feel lighter, contributing to its bounce. As a battery discharges, its internal components, such as the cathode, anode, and electrolyte, unde ...
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91095 |
duddy |
9 years ago |
What's it like in prison?
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New research has found that prison erodes the brain due to a lack of stimulation - I could have told you that. But what's more interesting is how Peter Sunde, the co-founder of the file-sharing website The Pirate Bay, describes his experience (quote below), as he spent time in prison for aiding and abetting copyright crimes. What is most difficult to cope with is the boredom, Sunde says. The days in prison merge into a grey mass, indistinguishable from each other. Sunde has trouble sleeping at night. “You become brain-dead in here,” he says. “A guy who has been here a long time said it best: what I miss most are new memories.” ...
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76386 |
duddy |
9 years ago |
New ways to stop cancer once it spreads
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When a person dies from cancer, the culprit isn't usually the original tumor - it's metastasis, the spread of cancer cells throughout the body. Now, researchers have managed to package a drug in nanoparticles (a microscopic particle with at least one dimension less than 100 nm) so that it can target these cancer cells without, crucially, interfering with normal cells - and report that they've stopped cancer cells from spreading in mice. Nanoparticle research is currently an area of intense scientific research, due to a wide variety of potential applications in biomedical, optical, and electronic fields. Source: http://news.sciencemag.org/biology/2015/01/nanoparticle-drug-stops-cancer-s-spread-mice ...
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27343 |
duddy |
9 years ago |
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26189 |
duddy |
9 years ago |
Finally, some good news related to tigers
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India’s tiger population has risen from 1,706 individuals to 2,226 in the past four years, officials have reported. With the global population teetering around 3,000 individuals, this kind of growth is incredible.
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30321 |
duddy |
9 years ago |
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33902 |
duddy |
9 years ago |
Higher testosterone levels linked to men who enjoy spicy food
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According to a recent study conducted by researchers at the University of Grenoble in France, the results published were plain and simple - men who enjoyed dipping their food into hot, spicy sauce happened to have higher levels of free testosterone floating around their bloodstream after the meal. Salt preference, however, didn’t seem to have any link to testosterone levels. What does this correlation entail? Does capsaicin - the chemical responsible for spiciness - increase testosterone, or are those who are more likely to take risks possess higher levels of this potent male hormone? ...
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34488 |
duddy |
9 years ago |
One very hot scale
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Here's absolute zero (-273.15°C) to absolute hot (1,420,000,000,000,000,000,000,000,000,000,000°C) and everything in between.
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17553 |
duddy |
9 years ago |
How ocean creatures size up to humans
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Here are the most accurate measurements of the ocean's biggest animals. These are confirmed measurements, unlike many found on the internet that state outrageous numbers.
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17971 |
duddy |
9 years ago |
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17525 |
ehd123 |
9 years ago |
What do sounds look like?
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In this video, sand is sprinkled onto a metal plate attached to a speaker, which is then turned up the to bring the whole thing to life in a pulsating, dance of intricate patterns.
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15510 |
duddy |
9 years ago |
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17024 |
duddy |
9 years ago |
What's faster, a falcon or a skydiver?
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Watch the fastest animal in the world - a peregrine falcon - effortlessly accelerate to speeds of more than 290 km/h to chase a plummeting skydiver.
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9514 |
duddy |
9 years ago |
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10315 |
ehd123 |
9 years ago |
Floaters
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Have you ever chillaxed (chilling and relaxing ![Smiling Face with Open Mouth](https://biology-forums.com/Smileys/default/1f603.png) ) under the sun, cloud watching, and all of a sudden noticed transparent blobs floating around? Did you know what these things were? I know I didn't until I saw this:
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6520 |
ehd123 |
9 years ago |
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