Proceedings of the National Academy of Sciences<\/em><\/a> that bursts of eye movement are accompanied by limb activity and muscle twitches, which are also seen in vertebrates. In humans, REM sleep is also associated with dreaming.<\/p>\nR\u00f6\u00dfler now plans to investigate whether the spiders\u2019 brain activity is heightened during bouts of REM. But she is cautious about this line of thought: \u201cIt is an enormous step to be wondering about dreams. I think this is amplified by our human bias and our own experience and imagining that \u2018dreaming\u2019 would look or feel the same in other animals. Animals experience the world differently, so a \u2018dream\u2019 is likely very different.\u201d<\/p>\n
Main image: jumping spider (<\/em>Evarcha arcuata). \u00a9\u00a0ljphoto7\/Getty<\/em><\/p><\/body><\/html>\n
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