The first part of the Potter finale also received three complaints, with one viewer believing the tone was too dark and bleak for young teens.
Another was concerned about Harry walking on an iced-over river unaccompanied, feeling that this may encourage young fans to do the same.
However, the BBFC said that the dangers of walking on ice were actually clearly illustrated in the film.
Tools designed to ensure computer code in smart cars does not crash has been inspired by hungry penguins.
The rounded sleeping capsules send guests drifting into ocean before arriving on desert island by morning.
Sitting on the saddle activates the part of the brain responsible for learning, a study has claimed.
Scientists are appealing for more people to donate their brains for research after they die.
Life on Earth may have arrived from Mars on an asteroid, scientists have claimed.
Lunar mission scheduled at the end of 2017 could find out if beer can be brewed on the moon.
A bottle used to teach children how far litter can travel ended up on Scottish beach after 8,700-mile journey.
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