A review of the sciences.

Today the desert of southern Israel is a barren and arid wilderness, but 2,000 years ago innumerable farms and great cities flourished there. One man, a botanist and amateur archaeologist, Professor Michael Evenari, unearthed the simple yet highly sophisticated methods of water-engineering and cultivation used by these ancient people and applied them himself.
Horizon visited his thriving farm in the Negev and tonight looks at the man and his work.