When were meteorites formed?

Answer Meteorites were formed from the dust and materials of the early solar system. Scientists use radiometric dating to determine the age, which can vary substantially. The oldest meteors show ages of "... Read More »

Top Q&A For: When were meteorites formed

When were meteorites first discovered?

What we call meteorites were thought, for most of our history, to be strange and unique, but still Earthly rocks. It wasn't until 1794 that a scientist named Ernst Chladni put forward the idea that... Read More »

When were the African deserts formed?

Africa's three main deserts--the Sahara, Kalahari and Namib--formed at different times. The Sahara, the world's largest desert, formed between 5,000 and 10,000 years ago. The Kalahari, more savanna... Read More »

When were the Sierra Nevada Mountains formed?

The history of the Sierra Nevada Mountains stretches back about a quarter of a billion years with the collision of the Pacific and American tectonic plates. Rock that melted due to the friction bec... Read More »

When were the first black churches&schools formed?

The first church that was specifically for African-Americans was built around 1773 in the city of Savannah, Georgia. The exact date that the church was built it is not known for certain. The first ... Read More »