Individual dolphins identify themselves to new dolphins they meet

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Dolphins are able to carry on multiple conversations simultaniously.

Dolphins apparently have a system of identifying themselves to each other similar to the way you and I use names.

Scientists have actually known since the 1960s that this system existed. Basically, each dolphin creates their own “signature” whistle when they’re very young. In studies of captive dolphins, they used this whistle mainly when they got separated from the rest of the group. It was like a way of saying, “Hey, I’m over here!” Or, given the environment, perhaps some version of “Marco! Polo!”

But at Not Exactly Rocket Science, Ed Yong writes about a new study of wild dolphins that has really increased our understanding of signature whistles and how dolphins use them…

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Anonymous, decentralized and uncensored file-sharing is booming

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Other means of sharing are available if worst case scenarios becomes reality

The file-sharing landscape is slowly adjusting in response to the continued push for more anti-piracy tools, the final Pirate Bay verdict, and the raids and arrests in the Megaupload case. Faced with uncertainty and drastic changes at file-sharing sites, many users are searching for secure, private and uncensored file-sharing clients. Despite the image its name suggests, RetroShare is one such future-proof client.

The avalanche of negative file-sharing news over the past weeks hasn’t gone unnoticed to users and site operators.

From SOPA to Megaupload, there is a growing uncertainly about the future of sharing….

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How to extract your own DNA using household items

You can extract your own DNA with drinking water, salt, dish soap, alcohol, food coloring, and your own spit! This NOVA/PBS-made video shows you how.

I’ve been writing about DNA for more than a decade, and I just realized that until this video, I’ve never actually seen DNA. And there it is, in the form of a white string in a plastic cup. Pretty freaking neato…

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How airports are embracing solar power

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Solar power is part of the airline process now.

From Denver Colorado Airport’s 2MW solar array to Palau’s installation of PV awnings at its airport carpark, it seems that solar arrays are appearing at airports around the world. And not without good reason.

Given that airports need large amounts of land, both for car parking and surrounding runways, they are in many ways an ideal fit for large-scale ground-mounted solar arrays that might otherwise cause land-use and/or aesthetic concerns for the surrounding community…

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Bacteria communicate by touch, new research suggests

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Associate professor Christopher Hayes and graduate student Christina Beck researching.

What if bacteria could talk to each other? What if they had a sense of touch? A new study by researchers at UC Santa Barbara suggests both, and theorizes that such cells may, in fact, need to communicate in order to perform certain functions…

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Inventor proposes levitating buildings on air cushions during earthquakes

Those of us who merely watched the devastating 2011 Tohoku earthquake on screens got to witness something amazing: the resiliency and resourcefulness of the Japanese people. And we’re still seeing it as Japan prepares for future earthquakes. Here’s one example. Youichi Sakamoto invented a foundation structure that raises buildings on air pockets as soon as an earthquake starts…

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The true cost of gasoline is closer to $15 a gallon

Last week’s news cycles were dominated in part by rising gas prices, and the political parties’ response to costs at the pump inching closer to $4 per gallon. The GOP is outraged, rather, is feigning to be outraged, and is disingenuously blaming Obama’s energy policies for the spike.

But all this political football obscures one important fact…

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SOPA’s author wants everything you do online logged and made available without a warrant

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Lamar Smith has a unique vision for your internet rights.

Lamar Smith (R-TX), author of the ill-starred SOPA Internet regulation, has an even dumber idea for the Internet. In the name of fighting child pornography, he wants to force ISPs to log everything you do online, then make it available to police and government agents without a warrant. Leslie Meredith has a writeup on the mounting opposition to Smith’s latest act of unconstitutional lunacy…

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Five common misconceptions about the Middle Ages

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The Middle Ages may not have actually been the way you thought.

No matter how interested you are in history, you probably have still heard a lot about the Dark Ages, but much of that information, even the stuff you learned back in school, is actually fiction. Here are five commonly held beliefs about the Middle Ages that aren’t actually fact.

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The problem with body mass index

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BMI is a simple system, but it does have some flaws.

The Body Mass Index is a popular way to measure and assess whether someone is overweight or underweight. Basically, it’s just your weight divided by your height. BMI is a simple system, but it does have some flaws. Over at the Obesity Panacea blog, Peter Janiszewski (who has a Ph.D. in exercise physiology) has a nice post explaining why BMI is sometimes useful, and also why it’s not a great measurement of individual health…

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