In May 2015, researchers in central Kazakhstan witnessed something really strange: thousands of saiga antelopes began acting a bit weird, becoming unbalanced, and then just plopping on the ground within a few hours — dead. Over the course of just three weeks, more than 200,000 saigas died, or about 60 percent of the global population.
“I had never seen anything like it,” says Richard Kock, a wildlife veterinarian and professor at the Royal Veterinary College in the UK. “It was very concerning because it was so unnatural, outside of the realm of my experience.”
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