The weight of thought

The brain takes on blood — making it a bit heavier — as someone thinks heavy thoughts

By Stephen Ornes, 13:20 PM February 4, 2014

In the late 1880s, an Italian scientist reported that thinking can make the brain grow heavier — if only for a short while. The scientist, Angelo Mosso, placed volunteers on a full-body balance, which looks like a teeter-totter. Then he asked them to concentrate on something. And suddenly their heads grew heavier.

Scientists have just performed an updated version of that experiment and confirmed Mosso’s supposedly wacky findings. David Field and Laura Inman work at the University of Reading in...

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