Showing posts with label Film. Show all posts
Showing posts with label Film. Show all posts

Wednesday, March 23, 2011

The Namib Desert Beetle: A Recipe for Water

The Namib Desert Beetle laden with water droplets (Photo credit: Solvin Zankl)
As the early morning fog drifts across the Namib Desert of south-west Africa, an army of spindly-legged beetles emerges from the sand. Accustomed to an average annual rainfall of one inch, these critters are eager to employ their water collection apparatus that makes them so unique. The process begins when heat is radiated from the matte black exoskeleton, resulting in a body temperature slightly lower than that of the surrounding air. With the beetle's body held at a 45° angle to the sand, the moist breeze contacts the cool exoskeleton and water condenses into small droplets. This beading effect is facilitated by a series of hydrophilic (water attracting) bumps surrounding by a waxy, hydrophobic (water repelling) surface on the insect's back. The droplets may grow to nearly a quarter of an inch, and then roll down to be gratefully sequestered by the beetle's mouthparts. And then it's back down the dunes and away from the morning sun for these diminutive hydroplants.

A seawater greenhouse in Australia (Read about the exciting initiative here)
Researchers at MIT have used this peculiar water collection mechanism as a model for the synthesis of materials used in a range of innovative research and industrial devices (See the news article here). Among other applications of this mechanism is a seawater greenhouse project designed for arid coastal regions, described by Michael Pawlyn in his presentation entitled "Using nature's genius in architecture" (Available on TED here). These projects represent yet another example of innovation based directly on natural systems observed on this planet - the ultimate design project.

Can't get enough?
The beetle's water collection mechanism was first described in the article: Parker, Andrew R., and Lawrence, Chris R. November, 2010 "Water capture by a desert beetle." Nature 414: 33-34. More about this insect, and other biomimicry projects can be explored on AskNature. Watch the BBC wildlife feature on this beetle here.

Wednesday, February 16, 2011

Film Feature: 180° South (2010)

Surfing below Cerro Corcovado, Patagonia, Chile (Photo credit: surfriderhumboldt)
The iconic stone statues of Easter Island serve as an object lesson in conservation when you hear the backstory of the rise and fall of an entire culture, and environment. What was to be gained by erecting such extraordinary effigies? And at what price? On his quest to follow the monumental 1960's journey of Yvon Chouinard and Doug Tompkins, surfer and rock-climber Jeff Johnson learns several important lessons in conservation along the way. From landscape-transforming dams in South America, to video gaming habits in the United States, there is a need to step back and rethink our ecological impact on the planet. An incredible story of ordinary people taking part in the conservation of some of the most beautiful habitats on earth, this film threatens to inspire you to do the same.

Find the official film site here, or purchase on Amazon here

Saturday, February 5, 2011

Film Feature: The Botany of Desire (2009)

The four feature crops of The Botany of Desire (Photo credit: HomesteadGardens)
In this film, based on Michael Pollan's 2001 national bestseller The Botany of Desire, the symbiotic relationship between humans and agriculturally-significant plants is explored via four representative crops. The apple, prized for its sweetness, the tulip for its beauty, cannabis for its pleasurable intoxication, and the potato for its power over human fate. By considering the history of these four plants, from their humble origins in the wild to their modern-day place in human economy and society, the film approaches the association from a plant's perspective to ask the question: do plants "use" humans as much as we use them?


The apple is thought to have originated in Kazakhstan, and later introduced to the rest of Asia, Europe, and eventually America, where Johnny "Appleseed" Chapman played a major role in spurring the adaptation of robust apples varieties to the New World by planting seeds rather than grafting selectively-bred species onto rootstock. Today, scientists and farmers are responding to pest and disease threats to monocultured apples by harnessing the biodiversity of "old world" breeds through cross-fertilization, gene transfer, and mixed crops.

The history of the tulip is perhaps even more astonishing. From its original distribution in central Asia, the obsession over the flower's beauty blossomed to result in the "tulip mania" of 17th century Holland, where a single tulip bulb sold for more than the grandest canal house in Amsterdam (in today's economy, equivalent to a town house on 5th Ave, or 10-15 million dollars). Although this absurd speculative bubble crashed in 1637, the obsession exists even today - with no better illustration than the Dutch Aalsmeer Flower Auction, which covers an area greater than 200 football fields and processes 19 million fresh flowers a day (roughly 30% of the world's flower market).

Few plants have had such an influence on human society as Cannabis, or marijuana. In America alone, 750,000 arrests are made per year for possession of the plant or drug, accounting for one third of all crimes. An estimated 15 million Americans use the drug on a monthly basis. Cannabis was discovered in India and China thousands of years ago, and has since spread to almost every country where suitable climates can be accessed or simulated. Scientists in Israel have recently found that THC, the compound responsible for the plant's hallucinogenic effects, acts similarly to the brain's own molecule, anandamide - involved with the calculated "forgetting" of extraneous sensory information. Do you really need to remember every face you saw at the transit mall this morning? This connection, according to some, offers potential uses of Cannabis, or THC, in the treatment of posttraumatic stress.

And last, but not least, is the potato. Unlike the previous examples, this plant originated in the Andes range of South America before introduction to Europe in the late 16th century by Spanish conquistadors. It very quickly became the staple food source of Northern Europe, especially Ireland - facilitating the Industrial Revolution and resulting in the death of 1 million people during the potato famine of 1845. Though the Great Famine should have served as a lesson, the agricultural sector continues to practice monoculture of this crop - churning out enough Russet Burbank potatoes to provide the 7.5 million pounds of French fries eaten by Americans every year. Recent efforts have been made to integrate polyculture practices, natural pests, and genetic engineering into the potato industry to save environmental, health, and economic costs.

The take-home message? Humans are intricately woven into the web of life, with plants impacting our lives just as much as we impact the plants' lives. In order for this mutual relationship to continue and thrive, we must allow the plants to adapt just as we do ourselves, and part of that means eliminating the pervasive practices of monoculture and pesticide.

Find the PBS site on this documentary here

Photo credits: Apples (ImageShack), tulips (vo2ov), cannabis (Susty), and potatoes (Guardian).