What is the evidence that continents are shifting

Does the threat of global warming require international cooperation? why or why not?

Why slip off slopes are found on the inside of meanders? why river cliffs are found on the outside of meanders?

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?