Why does evolution sometimes repeat itself? Spider-eating spiders may hold the answer0

• From Around the Web, Science & Technology
• March 13, 2018

Discovering something for the second time might sound like a letdown. Not for ecologists in Hawaii, who have found that spider-eating spiders on four islands there independently evolved the same colors: gold, black, and white. This rare example of parallel evolution, which has also been seen in one other Hawaiian spider, could help clarify one of biology’s biggest mysteries: how and when evolution repeats itself.