In what year was a lightbulb created? and see a drawing made by me of Tsukishima Kei!

Which of the islamic empires (ottomans, mughals, safavids) were the most influential and why?

Wha industry did the refrigerated rail car impact the most

Which suggests the most critical aspect of the peak oil theory? 1) controversy rages over rumors that the fracking lobby in washington has influenced the statistics. 2) supporters and critics argue endlessly over the rate of extraction and shape of the bell curve. 3) saudi arabia will soon have to begin fracking, leading to protests and further destabilization. 4) a new oil discovery means a fresh peak cycle, making that region the target of aggressors.