The cotton gin was innovated by Eli Whitney and is important to the 1800d because of what it did to the innovation of cotton production in the south. Prior to the machine, enslaved people were forced to hand process cotton, now with the machine, more cotton was able to be processed faster which allowed for slavery to continue and expand in the south so that more cotton could be sold to Britian (who did not have the land for cotton growing) and the northern factories to be made into clothes (increasing production of the industrial revolution especially with the Lowell mills). This will be important later with the Civil War as the south believes that Britian will support them because of their trading history and need for cotton (which of course is not done, due to racial tensions between the newly freed persons of Britian and the enslaved system of the South).
The Kansas-Nebraska act allowed the people to vote if wanted to allow slavery in those states and this act served to appeal the Missouri Compromise. The Missouri Compromise prohibited slavery in the north. This act was also said to be a failure because it was made to end the conflict over slavery, but resulted in Kansas becoming a "battleground over slavery."
Yurovsky, the executioner of the Russian Imperial Family, left a detailed account of the events that transcurred on the night of July 16th, 1918, when the Romanov family was assassinated. In it, he describes the scene with the tsar Nicholas II in the following way:
"...so far as I can remember, I said to Nicholas approximately this: His royal and close relatives inside the country and abroad were trying to save him, but the Soviet of Workers' Deputies resolved to shoot them. He asked "What?" and turned toward Alexei. At that moment I shot him and killed him outright. He did not get time to face us to get an answer."
Isaac Newton created the first modern telescope. He eliminated the chromatic aberrations. His laws of motion are also an important. Newton participation in science have changed science and enhanced it greatly. He is one of the most respected mathematician, scientist, and philosopher.