What is not a main source of evidence for the existence of dark matter? ?

How does sea floor spreading relate to supercontinents?

Is our world actually shaped as a globe

Which statement is an accurate description of life in mongolia in recent years? the majority of the population now lives in cities. after a brief period of democracy, communists regained control of the government. subsistence farming remains the primary economic activity in the country. relations between mongolia and china are now tense. -gradpoint