(Photo: Spirit of America, Shutterstock). The Fourth of July celebrates the day in 1776 when colonial American representatives ratified the Declaration of Independence, making official their intention to break away from England and organize a sovereign government.
The Most Deadly Animals: Mosquitoes. The most deadly Â­animal in the world is the mosquito. It might seem impossible that something so miniscule can kill so many people, but it's true. Mosquito bites result in the deaths of more than 1 million people every year [source: WHO ].
Mosquitoes are famous carriers of the heartworm parasite, which is a small roundworm. Heartworm disease starts when a mosquito that carries the parasite bites a dog, cat or other animal. Because mosquitoes are blood-sucking insects, each bite spreads the disease from one animal to another.