From a handful of birds to billions of insects, swarms can be almost any size. The rules are simple: travel in the same direction as those around you, stay close & avoid collisions. But ... why do animals swarm in the first place? And how do they do it without a leader? The science of swarms: | TED-Ed

Mosquito season is upon us once again in my city! Usually, I have a foolproof plan to avoid these pesky creatures - hiding under my blanket at night. This method has always been the most effective and convenient way for me to keep those little biters at bay. However, this year, things have taken a strange turn. We are dealing with unusually large mosquitoes, almost the size of sparrows, if you can believe it! Their buzzing isn't just a quiet hum anymore, it's a deafening drone! And given their s