Don’t look now, but your seemingly harmless wireless router could be slowly killing your houseplants, an experiment by high school students in Denmark has suggested.

The students’ biology experiment used 400 cress seeds and exposed half of them to sunlight, and half to mobile phone radiation.

“We all thought we experienced concentration problems in school if we slept with our mobile phones at the bedside, and sometimes we also found it difficult sleeping,” said Lea Nielsen, one of the five researchers.

Following the experiment, the five girls from North Jutland no longer sleep with their mobile phones at their bedsides.

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