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Gavril has discovered the existence of Polybius, a video game which, according to legend, causes nausea, hallucinations, insomnia and even memory loss in those who play it. He investigates byconsulting reliable sources.

Legend has it that on his birthday, a child had so many birthday balloons that he flew away with them. Amber uses the experimental approach to carry out tests.

Shyrelle's only fear is that her eyes will get stuck and that she would be cross-eyed. It's time for Shyrelle to unravel the mystery by investigating.

Crocodiles in the sewers: truth or legend? Wassim is determined to find out and investigates.

Thibault dreams of acquiring powers, like the ability to bend objects with his mind. Is it possible? He'll have to investigate.

Ambre explores the Paris metro to check whether stations built over cemeteries are haunted. Ambre manages to find out if the legend is true.

What if the legend that we all swallow an average of 7-8 spiders a year in our sleep is true? Shyrelle learns more about false information circulating on the web.

What if the umpteenth attack on a cyclist by an aquatic monster lurking in the Seine were true? Thibault consults a magnet fisherman and an agent from the police river brigade to debunk the legend.

Gavril learns that some paintings in museums are fake. But is it true? Determined to investigate, Gavril meets a guide at the Musée des beaux-arts and a curator at the Musée du Louvre.

Wassim is disgusted by municipal swimming pools. He learns about urine detectors that color the liquid to shame those who pee in the deep end. To investigate, Wassim meets a chemist.

Are we more likely to be hit by a meteorite or satellite debris? Gavril investigates by meeting a meteorite expert. He then visits the Air Museum to learn more about satellites and space debris.

Wassim tries to convince his friends that aliens are on Earth. He'll need to do some research to do so.

A Canadianair plane may have mistakenly sucked in a swimmer! Is it true? A journalist teaches Thibault to do his research, ask questions and beware of false information.

Shyrelle is desperate to protect herself from vampire bats! Do they really exist? To investigate, Shyrelle meets a vampirologist and a specialist to learn more about this legend and the role of bats.