31.3 MB (2.3 MB compressed)
4050 x 2700 pixels
34.3 x 22.9 cm ⏐ 13.5 x 9.0 in (300dpi)
EDWARD KINSMAN / SCIENCE PHOTO LIBRARY EDWARD KINSMAN / SCIENCE PHOTO LIBRARY
A human powered hydrofoil design is tested in a fresh water lake. This device uses a bouncing motion to propel the rider through the water at speeds up to 15 miles per hour. The device requires about as much effort as a runner sprinting.
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