Sort:  

it was a research for about a year ago. that was ordered form us at school. i looked at a multitude of sources so i could not get it now, yet i remember being must influenced by Veritasium's videos about the topic

Coin Marketplace

STEEM 0.21
TRX 0.13
JST 0.030
BTC 68156.06
ETH 3517.56
USDT 1.00
SBD 2.81