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World's smallest helicopter to fly in da Vinci birthplace Technology / Engineering May 14, 2008 \| User rating: 3.8 / 5 after 23 vote(s) \| User comments: 5 The world's smallest one-man helicopter will soon take flight in the birthplace of Leonardo da Vinci, who is credited with having first thought of a vertical-flight machine, its developer said.

A baseball cap that reads your mind Technology / Engineering 23 hours ago \| User rating: 4.2 / 5 after 23 vote(s) \| User comments: 3 It looks like an ordinary baseball cap. But when you put it on, the cap detects and analyzes the electroencephalogram (EEG) signals from your brain. It can even tell you if you’re getting too sleepy when driving ...

Soldered lenses Technology / Engineering May 13, 2008 \| User rating: 4.3 / 5 after 12 vote(s) \| User comments: 1 Lenses in optical devices are kept in place by adhesives. This can cause problems when the microscopes and cameras are employed inside a vacuum, as the adhesives may release gases that contaminate the lenses. ...