Designed to Walk on Water | The Institute for Creation Research

Designed to Walk on Water

Insects called water striders spend their lives gliding gracefully across stream surfaces. Scientists from China have uncovered some specific design specifications that perfectly suit the insects' tiny leg hairs for walking on water.

The insects are usually smaller than 15mm, but unless their leg hairs, called "setae," follow a particular formula specifying length, spacing, and angle of placement, even creatures this small would sink.

Professor Huiling Duan of Peking University, senior author of the report published in Proceedings of the Royal Society A, told ABC Science, "In fact, water repellency of hairy surfaces depends on the size, spacing and orientation of the hairs in micro-scale."1,2

So, how do water striders' leg setae compare with the ideal arrangement? According to ABC Science, "They found the spacing of the water striders' leg hairs, and the hairs on a fly's wing, is optimised [sic] so that the hairs are close enough so as to not penetrate the water's surface during impact, but not so close together it becomes inefficient."2

Bunching the setae closer together would cause the insect's legs to stick too strongly to water's surface when trying to lift them during locomotion. So, the spacing between each individual seta is set to a Goldilocks standard—not too far apart that water striders sink, and not too close together that they can't move. What about other setae specifications?

Not only are the hairs perfectly spaced, but they are sized and angled just right to balance the requirements of gravity, structural soundness, and capillary force. The researchers wrote in the Proceedings, "Our analysis makes it clear that the setae on water striders' legs or some insects' wings are in such an optimized geometry." In other words, they could not be better designed to match the functional need.

In explaining this design without a designer, evolution's proponents face a tough task, since all three specifications—size, angle, and spacing—had to occur at the same time for water striders to not sink and die. We always see intentional engineering whenever we witness the making of machines with multiple simultaneous specifications—like in cars, airplanes, and boats. Why should it be any different with these marvelous insects?


  1. Xue, Y., et al. Enhanced load-carrying capacity of hairy surfaces floating on water. Proceedings of the Royal Society A. Published online before print, March 5, 2014.
  2. Nogrady, B. Leg hairs hold secret to walking on water. ABC Science. Posted on on March 5, 2014, accessed March 18, 2014.

* Mr. Thomas is Science Writer at the Institute for Creation Research.

Article posted on April 28, 2014.

The Latest
Mystery of Moths' Warning Sound
Insects of all types continue to amaze entomologists with their design and physiology. Cleveland Hickman, Jr., et al. stated, “insect ears are...

Geneticist Fired for Affirming Humans Once Lived 900 Years?
Geneticist Alexander Kudryavtsev, the head of the Russian Academy of Science’s Vavilov Institute of General Genetics, has been fired, reportedly...

Creation Kids: Solar Eclipses
Designed by Susan Windsor* You're never too young to be a creation scientist and explore our Creator's world. Kids, discover fun facts...

Motmot's Beauty Displays God’s Gracious Design
Beauty is God’s good gift. Whatever is truly good and beautiful comes from God (James 1:17), whose own beauty is beyond words. King David longed...

Eclipses: The Handiwork of Jesus Christ
Many remarkable events have occurred over the past 50+ years of the Institute for Creation Research’s ministry, but one of the most exciting is...

Dolomite Problem Best Solved by Flood
Dolomite is a very common sedimentary rock, comprising about 30% of all carbonate rocks.1,2 Its chemical formula is MgCa(CO3)2, whereas the...

RNA Editing: Adaptive Genome Modification on the Fly
When the workings of the genome were first being discovered, the central evolutionary dogma of molecular biology claimed that genetic information passes...

Great Sand Dunes National Park and Preserve: Colossal Ice Age...
The tallest sand dunes in North America are found in Great Sand Dunes National Park and Preserve, located on the eastern edge of the San Luis Valley...

Why Biology Needs a Theory of Biological Design – Part 1
Anyone who watches American football has observed a predictable inconsistency. When a pass is caught extremely close to the sideline, everyone with...

Spring 2024