E-readers get heavier with each book31/10 2011
“Prof Kubiatowicz calculated that filling a 4GB Kindle to its storage limit would increase its weight by a billionth of a billionth of a gram, or 0.000000000000000001g.”
E-readers are meant to let bookworms carry their entire libraries with them
without any additional weight – but the devices actually get heavier every
time a new text is downloaded.