Nova1974 | TV Show

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PBS's premier science-documentary series, which has won six Peabody Awards and more than 20 Emmys (four in 2002 alone) since its 1974 debut. `Nova' clearly, and often engagingly, `demystifies' a vast range of science, technology and history topics---past a (more…)

Premiered: March 3, 1974

Rating: None

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Season 5, Episode 17 The Desert's Edge

First Aired: May 31, 1978

How arable terrain in and around the Sahara is turning into wasteland. Viewed: projects used to recultivate these areas, including the planting of trees with their own reservoirs; and a “drip-irrigation” system by which plants' roots are constantly kept moist.

Previous Episode

The Insect Alternative

Season 5, Episode 16

May 24, 1978

Next Episode

The Tse Tse Trap

Season 5, Episode 18

June 7, 1978

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