Scientists show how sperm and egg come together like a key in a lock

How a sperm and an egg fuse together has long been a mystery. New research by scientists in Austria provides tantalizing clues, showing fertilization works like a lock and key across the animal kingdom, from fish to people.

Scientists show how sperm and egg come together like a key in a lock

Scientists show how sperm and egg come together like a key in a lock

Scientists show how sperm and egg come together like a key in a lock

Scientists show how sperm and egg come together like a key in a lock

Scientists show how sperm and egg come together like a key in a lock