How did the disputed 1876 election returns further reduce the power and influence of the republicans in the south?

Why is the battle of new orleans in the war of 1812 important?

How does a comet change when it comes close to the sun

After the success of the sputnik launch, the united states feared that they would never be able to launch their own satellite, the ussr had used technology developed by the united states, the soviets had superior nuclear capabilities, that any future us satellites would not be as successful.