5. Birds and Bullet Trains
If you’ve ridden a bullet train, you may have noticed the loud noise it makes emerging from a tunnel, but what you would not notice it if you rode one of the newer ones inspired by birds. In the 1990’s Japanese engineer named Eiji Nakatsu noticed how elegantly Kingfisher birds dove into the water, barely making any splash. He wondered if he could somehow make bullet trains work the same way.
His research on kingfisher beak led to a new bullet train design that was not only quieter, it was also more aerodynamic making it more energy efficient and allowing it to travel at higher speeds
