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Welcome to the Science Podcast for February 12, 2021. I'm Sarah Crespi. Each week, we feature the most interesting news and research published in science and the sister journals. First up we have science writer Rachel Cernanski. She talks to me about progress on Africa's Great Green Wall Project and the important difference between planting a tree and growing a tree. Then I talk with

researcher Vatslav Kuna about using loud, long songs from fin whales to image the crust

under the ocean floor.

Now we have science writer Rachel Cernansky with an update on Africa's Great Green Wall project,

which will soon see an infusion of billions of dollars

from the World Bank and others.

This project, the Great Green Wall, is intended to

serve as a bulwark against desertification of the land south of the Sahara Desert, while at the

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