The Airbus A400M is one of the most distinctive aircraft in the sky, and its unusual humming sound is a big reason why. Produced by the interaction of its massive counter-rotating propellers, the ...

The research continues, with a paper published in the journal The Anatomical Record reporting on new experiments to analyze the flexibility of feline spines. Over the centuries, scientists have ...

During World War II, Germany built one of the most enormous transport aircraft ever flown: the Messerschmitt Me 323 Gigant. With six engines, counter rotating propellers, and a wingspan of more than ...