Explanation:
In geology, petrifaction or petrification is the process by which organic material becomes a fossil through the replacement of the original material and the filling of the original pore spaces with minerals.
Answer:
Alarmed over rapid developments in military technology by his Communist rivals in the USSR, President Dwight D. ... High-altitude U-2 spy planes began making reconnaissance flights over the USSR in 1956, giving the U.S. its first detailed look at Soviet military facilitie
Answer:
Gettysburg Address: On November 19, 1863, President Abraham Lincoln delivered remarks, which later became known as the Gettysburg Address, at the official dedication ceremony for the National Cemetery of Gettysburg in Pennsylvania, on the site of one of the bloodiest and most decisive battles of the Civil War. Though he was not the featured orator that day, Lincoln’s brief address would be remembered as one of the most important speeches in American history. In it, he invoked the principles of human equality contained in the Declaration of Independence and connected the sacrifices of the Civil War with the desire for “a new birth of freedom,” as well as the all-important preservation of the Union created in 1776 and its ideal of self-government.
President Abraham Lincoln issued the Emancipation Proclamation on January 1, 1863, as the nation approached its third year of bloody civil war. The proclamation declared "that all persons held as slaves" within the rebellious states "are, and henceforward shall be free."
