INTELLECTUALLY SATISFYING VIDEO

INTELLECTUALLY SATISFYING VIDEO

LEARNING From Designs in Nature

"Many of our best inventions are copied from, or already in use by, other living things."—Phil Gates, Wild Technology.

AS MENTIONED in the preceding article, the aim of the science of biomimetics is to produce more complex materials and machines by imitating nature. Nature manufactures its products without causing pollution, and they tend to be resilient and light, yet incredibly strong.

For example, ounce for ounce, bone is stronger than steel. What is its secret? Part of the answer lies in its well-engineered shape, but the key reasons lie deeper—at the molecular level. "The success of living organisms lies in the design and assembly of their smallest components," explains Gates. As a result of peering into these smallest components, scientists have isolated the substances that give natural products from bone to silk their envied strength and light weight. These substances, they have discovered, are various forms of natural composites.

An Extinct Fly Helps to Improve Solar Panels

While visiting a museum, a scientist saw pictures of an extinct fly preserved in amber, says a report in New Scientist magazine. He noticed a series of gratings on the insect's eyes and suspected that these might have helped the fly's eyes to capture more light, especially at very oblique angles. He and other researchers began conducting experiments and confirmed their hunch.

Scientists soon made plans to try to etch the same pattern of gratings onto the glass of solar panels. This, they hope, will increase the energy generated by solar panels. It might also eliminate the need for the costly tracking systems presently required to keep solar panels pointed at the sun. Better solar panels may mean less fossil fuel use and, thus, less pollution—a worthy goal. Clearly, discoveries like this one help us to appreciate that nature is a veritable mother lode of brilliant designs just waiting to be found, understood and, where possible, copied in useful ways.

Nature's Gearboxes and Jet Engines

Gearboxes and jet engines keep today's world on the move. But did you know that nature also beat us to these designs? Take the gearbox, for example. Gearboxes allow you to change gears in your vehicle so as to get the most efficient use out of the motor. Nature's gearbox does the same, but it does not link engine to wheels. Rather, it links wings to wings! And where can it be found? In the common fly. The fly has a three-speed gearshift connected to its wings, allowing it to change gears while in the air!

The nautilus has special chambers that enable it to regulate its buoyancy

The squid uses a form of jet propulsion

The squid, the octopus, and the nautilus all have a form of jet propulsion that drives them through the water. Scientists view these jets with envy. Why? Because they are composed of soft parts that cannot break, that can withstand great depths, and that run silently and efficiently. In fact, a squid can jet along at up to 20 miles [32 km] an hour when fleeing predators, "sometimes even leaping out of the water and onto the decks of ships," says the book Wild Technology.