Over the past few years, labels such as DJI have pushed drones into the mainstream. If you look closely, you'll notice that a majority of them have four propellers, while helicopters have fewer of ...

The propellers of the world's ships and boats create a constant drone that disrupts ocean life. New propeller designs based on loops could one day quiet that drone and be more fuel efficient. Sharrow ...

You're currently following this author! Want to unfollow? Unsubscribe via the link in your email. Follow Jake Epstein Every time Jake publishes a story, you’ll get an alert straight to your inbox!