FIRST DOWN. All progress in a football game is measured in yards. The offensive team tries to get as much yardage as it can to try and move closer to the opponent's end zone. Each time the offense gets the ball, it has four downs, or chances, in which to gain 10 yards.
The largest eagle species in the world is the Pithecophaga jefferyi or Philippine eagle. This species of eagle is on the critically endangered list due to the rapid decline in habitat, which is the tropical rainforest. Keep Learning.
What is the largest bird in the world? The Martial eagle lives in Africa, and is known to be an aggressive hunter, feeding on prey as large as baboons, lion cubs and antelopes. Nearly as large as the Martial eagle is Stellar's sea eagle with a wingspan of 2.5 meters. It is the world's heaviest eagle, weighing up to 9 kg.