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Mobile phone battery explodes – level 3
16-10-2014 07:00
This surveillance footage from a bus in China shows...Self-building robot – level 1
26-08-2014 07:00
Scientists make a new robot. This robot is special. It...Self-building robot – level 2
26-08-2014 07:00
American scientists created a new robot. When they apply heat to...
