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Obnoxious insurance commercials notwithstanding, the gecko has contributed a fair amount to human culture. In particular, scientists have long been fascinated by the reptiles' foot pads, which give them the remarkable ability to climb on walls and ceilings.

Have you ever wondered how scientists work with tiny molecules that they can't see? Here's your chance to try it yourself! Sort and measure DNA strands by running your own gel electrophoresis experiment. This is a great visual for learning how to do electrophoresis.

Scientists in the US have created embryos with genes from one man and two women, using a provocative technique that someday could be used to prevent babies from inheriting certain rare incurable diseases. The researchers at Oregon Health & Sciences University said they are not using the embryos to produce children, and it is not clear when or even if the technique will be put to use.