O que é um raio?

Sabemos que a corrente elétrica é um fluxo de elétrons passando por um condutor. Cobre e prata são exemplos de bons condutores. Também sabemos que outros materiais são maus condutores para corrente elétrica podendo ser considerados até mesmo isolantes, um exemplo é a borracha. O que causa o fluxo de elétrons, e portanto a corrente elétrica, [...]
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Mammals Family Tree

This is the most complete Mammals Family Tree (cladogram) I have ever seen. It is circular, to fit in a smaller space, but even though, it is fantastic. It can be found in PDF and it is huge. You can see you there (Homo sapiens) beside the Pan paniscus and the Pan troglodites. Have fun… You [...]
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Dirt x Allergies

Nature lovers now have one extra reason to justify their passion for the outdoors: dirt. Apparently, dirt may be beneficial in the struggle against allergies, one of the modern world new epidemics. In the past 20 years, severe allergy cases have doubled in developed countries. We live under de impression that all kids are allergic to [...]
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Mosquitoes attraction

Researchers from Yale University have identified the proteins used by the malaria mosquito to sense their victims. Malaria affects hundreds of thousands f people around the world, occurs in areas that fits half the planet’s population and causes around a million deaths every year. One of the substances found to have great impact on the insects [...]
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Breathing in thin air

What a mountaineer, reaching Everest summit, at -40o C, enduring 100 km/h wind would see looking up? The sky and the summit? Yes! Rocks and snow? Absolutely. But there is a chance he would also see a flock of Asian geese (Anser indicus) flying just above his head, flapping its wings energetically while the mountaineer [...]
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Wolfram Alpha

http://www.wolframalpha.com This is a really cool site. We have absolutely no idea of where to fit it. Is it Physics, Biology, Chemistry, Maths? Is it a search engine, a game, design gadget? We decided to call it simply a tool. We have no words to explain it, so, take a look on some snapshots and try it [...]
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Minerals: Are they also running out?

Overpopulation and excess resource use leads us to think on petrol. Yes, we are running out of oil and we know it for some time already. But it the only natural material we are running out? What about the minerals? Nobody seems to be concerned with the end of iron, or aluminum. Yes, we recycle [...]
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AI Chess

See what the computer is “thinking” when you play against it. Orange is when he calculates his moves. Green is when he calculates your moves… good luck. http://www.turbulence.org/spotlight/thinking/chess.html
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BMW Fabric Concept Car

Get surprised by this car… could you imagine it? BMW Gina
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Butterflies fight?

Yes, they do happen. In the species of the gender Hamadryas (picture), the males attack who enters in their territories claping their wings. “The clapping noise is an advice to the invader to quit the fight”, says biologist André Freitas, from Campinas State University, SP, Brazil. And worse: it is not rare that some of [...]
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