The World Health Organization's cancer research agency says mobile phones are "possibly carcinogenic".

Ed Yong, head of health information at Cancer Research UK, said: "The WHO's verdict means that there is some evidence linking mobile phones to cancer but it is too weak to draw strong conclusions from.

For all organisms, the ultimate goal is to pass on one's genes. The problem with altruism is that sacrificing individual gains for the greater good can compromise that goal

The robots have two independently operating wheels and a "nervous system" composed of sensors and a camera, which allow them to detect small discs - a stand in for food.

Some of these "mutations" helped the robots better gather the food disks, while some made the robots less efficient at the task.

The more closely related the robots, the quicker they cooperated.

The iOS 4 operating system allows your iPhone to store location data constantly without you activating the feature. The unencrypted file where the data is stored, labeled "consolidated.db," was discovered and brought to light by software hackers Peter Warden and Alasdair Allen. The data is stored on your computer when you sync it with your iPhone.

"To make it less useful for snoops, the spatial and temporal accuracy of the data has been artificially reduced. You can only animate week-by-week even though the data is timed to the second, and if you zoom in you'll see the points are constrained to a grid, so your exact location is not revealed. The underlying database has no such constraints, unfortunately."

iRobot PackBots are being used to explore the interior of reactor buildings at the Fukushima Daiichi nuclear plant, which was severely damaged in last month's massive tsunami and subsequent hydrogen blasts.

In a release, Honeywell said its staff has flown five "successful" missions at Fukushima so far, recording video and images of the plant. The four T-Hawks there are equipped with radiation sensors.

The Eco-marathon is a race, of sorts. The only goal is doing 10 laps around a Houston park at an average speed of 15 mph while consuming the teeniest, tiniest amount of energy possible.

Last year's winners, from Laval University in Quebec, achieved a phenomenal 2,487.5 mpg with a futuristic streamlined three-wheeler that weighed less than the engine in your hoopty.

Critics are accusing the Tokyo Electric Power Company (TEPCO), owner of the severely damaged Fukushima Daiichi nuclear power station, of understating the scale of the crisis it faced early on, and failing to call in outside help that might have avoided the current and ongoing leakage.

Though outsiders were initially sympathetic to TEPCO, the consensus is now that it should have been more open about the situation, and sought international help and advice earlier.

What makes the robot special is its ability to build a computer model of its surroundings, incorporating information on lines of sight. The robot is fitted with a laser scanner to allow it to covertly map its environment in 3D. It also has a set of acoustic sensors which it uses to distinguish nearby footsteps and their direction.

If the robot believes it is in danger of being detected by an approaching sentry, it will try to get to a place where it can hide, Satterfield says.

Apple recently rejected an iPhone app that would have allowed customers to purchase and read e-books sold through the Sony Reader Store, and Apple told Sony that all in-app purchases would now go through Apple, Steve Haber, president of Sony's digital reading division, told the newspaper.

The new policy would effectively cut off Amazon.com and other companies that sell e-readers that compete with Apple's iPad, the Times noted. Many e-readers offer mobile apps that allow content purchased in their online stores to be read on other devices, including the iPad.

In a move redolent of the New Zealand haka war dance, Toshiba has decided to stick out its tongue, widen its eyes, and tell Apple that the iPad is, as they say in certain English quarters, pants.

For the site continues: "Add this to the list of interesting places on the Internet you can't see on your device. Of course, if you had a Toshiba Tablet, you would enjoy the entire Internet. Yep, Flash sites too."

As the cost of 3D printing hardware begins to drop, bespoke, printable products may be about to hit the market.

One scheme that is looking to capitalise in the technology is RepRap, short for Replicating Rapid Prototyping, which offers a cheap way of replicating objects - including the printer itself.

And the software and hardware specifications are all open source - meaning the machine can be duplicated freely.