Un matematician a calculat recent că eBook-ul devine mai greu când sunt adăugate cărţi noi în biblioteca virtuală – din cauza greutăţii energiei „câştigate” de electroni când înmagazinează informaţii. Această creştere în greutate este, însă, extrem de mică.Acum, un canal de ştiinţă de pe YouTube a folosit acelaşi model matematic pentru a calcula masa întregului internet.
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