Why don't rivers straighten out over time?

Seen from above, the world's greatest rivers can be recognized by their serpentine curves. But how do these shapes form, do they alter over time and does this matter? We turned to our river system expert, Carmelo Juez.

Melting glaciers have big carbon impact, study shows

As the Earth warms and glaciers all over the world begin to melt, researchers and public policy experts have focused largely on how all of that extra water will contribute to sea level rise.

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