Friday, September 30, 2005

Central America Deforestation

In 1986 Tom Sever, NASA's only archaeologist, acquired a satellite image of northern Guatemala to examine it for archaeological sites. As soon as he glanced at the image, Sever "was stunned that he could see the political border between Guatemala and Mexico, because of the deforestation in Mexico,".



Above: The razor-sharp border between Mexico and Guatemala, as seen in this 1988 Landsat image, shows the impact of rural settlements on the rainforest.


The image was so powerful, it was published in National Geographic magazine, and became a catalyst for the president and congress of Guatemala to set up what they call the Mayan Biosphere Reserve—Guatemala's largest protected area.

Bigger picture:


Credit: Science@NASA

Friday, September 2, 2005

Douglas Adams' Babel Fish

Adams at his best!

"The Babel fish, is small, yellow, and leechlike, and probably the oddest thing in the universe. It feeds on brainwave energy received not from its own carrier but from those around it.It absorbs all unconscious mental frequencies from this brainwave energy to nourish itself with. It then excretes into the mind of its carrier a telepathic matrix formed by combining the conscious thought frequencies with nerve signals picked up from the speech centers of the brain which has supplied them. The practical upshot of all this is that if you stick a Babel fish in your ear you can instantly understand anything said to you in any form of language. The speech patterns you actually hear decode the brainwave matrix which has been fed into your mind by your Babel fish. Now it is such a bizarrely improbable coincidence that anything that mindbogglingly useful could have evolved purely by chance that some thinkers have chosen to see it as a final and clinching proof of the nonexistence of God. The argument goes something like this: "I refuse to prove that I exist," says God, "for proof denies faith, and without faith I am nothing." "But," says man, "the Babel fish is a dead giveaway, isn´t it? It could not have evolved by chance. It proves you exist, and so therefore, by your own arguments, you don´t. QED." "Oh dear," says God, "I hadn´t thought of that," and promptly vanishes in a puff of logic. "Oh, that was easy," says man, and for an encore goes on to prove that black is white and gets himself killed on the next zebra crossing. Most leading theologians claim that this argument is a load of dingo´s kidneys, but that didn´t stop Oolon Colluphid making a small fortune when he used it as the central theme of his best-selling book, Well That about Wraps It Up for God. Meanwhile, the poor Babel fish, by effectively removing all barriers to communication between different races and cultures, has caused more and bloodier wars than anything else in the history of creation."