Each year, these plants poison about 20,000 heads of cattle, killing 22 percent of them and causing miscarriages in another 29 percent. |
Generations of scientists thought Marco Polo was the first to write about selenium poisoning. They were wrong. |
We found through lab work that the selenium levels in these samples were perfectly safe. Actually, the selenium level in the entire region is so low that high-selenium plants are unlikely to grow in such an environment. |