Why did the Supreme Court ruling in the Dred Scott case make a peaceful resolution of the conflict between the North and the South over slavery less likely?

Andreus vesalius is known for being the first scientist to provide detailed and accurate

What event started the space race and made americans feel their security was threatened a.) alan shepard's suborbital flight. b.) the launch of sputnik c.) the launch of explorer d.) the cuban missle crisis

Which consideration must be addressed when deciding for whom to produce? who can be most creative with the product? who has the largest resource pool? who has the greatest need? who can bring in the greatest profit?