Six million years ago, the skies of Argentina were home to fearsome predator – Argentavis magnificens, the largest bird to ever take to the air. It weighed in at 70kg and had a wingspan of 7m, about ...

Weighing in at 150 pounds (70 kilograms) or more, the all-time biggest bird couldn’t just hop into the air and fly away, researchers say. A team led by Sankar Chatterjee of Texas Tech University used ...

Weighing in at 70 kilograms or more, the all-time biggest bird couldn't just hop into the air and fly away, researchers say. A team led by Sankar Chatterjee of Texas Tech University used computer ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. With a wingspan of more than 20 feet, a condor the size of a Cessna airplane relied on updrafts ...

Scientists have identified the fossilized remains of an extinct giant bird that could be the biggest flying bird ever found. With an estimated 20- to 24-foot wingspan, the creature surpassed the ...

Biologists provide evidence that maximum body size in birds is constrained by the amount of time it takes to replace the flight feathers during molt. Why aren't birds larger? Fifteen-kilogram swans ...