When the Earth was young, asteroids bombarded the planet and possibly deposited compounds that later formed the first molecules of life.

In an attempt to learn more about the formation of the solar system and the origins of life, NASA is preparing a billion-dollar mission that will send a probe to collect dust from the surface of a nearby asteroid.

A product-design student in Derby, England, has invented a wheelchair alternative he hopes will give people with mobility issues more freedom, the BBC reported. Martin Harris, 21, noted that current wheelchairs are often restricted to paths. His battery-powered device "can work either indoors or outdoors - a leg can simply pick itself up and step over an obstacle."  

The chair, which can be steered by a joystick in the armrest, has six pairs of legs underneath the seat that consist of 216 pieces bolted together.

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