What did Milankovitch propose as the main cause of ice ages?

A collision with a large meteorite may have contributed to the mass extinction at the end of the _____ era?

During the Silurian period, the first animals to adapt to life on land were?

Question

What did Milankovitch propose as the main cause of ice ages?

A collision with a large meteorite may have contributed to the mass extinction at the end of the _____ era?

During the Silurian period, the first animals to adapt to life on land were?

thomaster · Answer

Please post 1 question at time.
Also these look like geography questions.
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