It would be "germs and disease" that had the greatest impact when the Old and New Worlds met, since the Natives in the New World were not immune to the germs that the Europeans were carrying--leading thousands of Natives to be killed.
Atleast 3 days, the Horizon probe got to the moon in 8 hours, but it was headed towards Pluto
Life drastically changed for African Americans after the Civil War. For one, they were now free -- after Lincoln freed the slaves in his Emancipation Proclamation. In the years that followed, little by little, freedoms were given. The black codes were overturned, and African Americans could vote and raise their families. But discrimination in the South was still relevant, and treatment towards African Americans in the former Confederate states worsened.
The First Amendement (Freedom of Speech) was the basis for Charles Schenck's 1919 Supreme Court arguments that his distribution of flyers and leaflets during WWI to promote draft resistance among young men was Constitutional.
Schenck was arrested under the Espionage Act of 1917. The Supreme Court upheld the decision finding that draft resistance in the midst of WWI was unconstitutional.