Balogun has two goals at the World Cup so far. Robin Alam / ISI Photos IRVINE, Calif. — Folarin Balogun wants to play and he wants to score. By nature, this is how the best center forwards operate.

When most silk-spinning spiders hunt, they build a web and wait for prey to blunder into it. But a newly discovered species from Australia instead uses its silk to craft a spring-loaded, cone-shaped ...