"How fast can we detect whether it's a drone or a pigeon flying? How fast can we detect ... "We should be able to handle a swarm, and we will see more and more coming in." This story is ...

What is behind the "swarm intelligence" of slime mold or a honeybee hive? How can pigeons possibly find their way home across hundreds of miles of unfamiliar terrain? In this episode of NOVA ...

Pigeons get everywhere: they swarm our streets and parks and pavements. And yet, have you ever seen a pigeon chick? The answer is almost definitely no. There are a couple of reasons for this.