The biggest sex event on Earth

This is something that is mind blowing when looks at primative nature !!

"Every year, and shortly after a full moon, billions of corals across a third of
a million square kilometers of Australia’s Great Barrier Reef enter in a frenzy
of reproduction. Now, an international team of Australian and Israeli
researchers has discovered the key to this
moonlight romance. It is an ancient light-sensitive gene, known as a
cryptochrome, which is present not only in corals, but in insects, fish and
mammals — including humans. These genes are primitive light-sensing pigment
mechanisms which predate the evolution of eyes — and are pretty sensitive to
blue light."