Poll: Dark Matter or Variable Gravity?

Gravity, in and of itself, is pretty amazing. It's called a weak force, but sometimes it's really strong and sometimes it's really weak.

It's strong enough to hold us all stuck to the planet, yet with not a whole lot of muscle power, we can jump and push against it. That you can lift up a feather from the ground makes it weak. It has some properties that makes it like magnetism, but it lacks the electrical charge factor.

If we could control gravity, it'd be trivial to use that technology to move vehicles and would make interstellar space travel close to reality.

http://www.telegraph.co.uk/money/main.jhtm...4/ccview114.xml

Global warming rage lets global hunger grow
By Ambrose Evans-Pritchard, International Business Editor

The catch is obvious. "The idea that you cut down rainforest to actually grow biofuels seems profoundly stupid," said Professor John Beddington, Britain's chief scientific adviser.

Goldman Sachs says the cost of ethanol from corn is $81 a barrel (oil equivalent), with wheat at $145 and soybeans $232. It is built on subsidy.

Whatever the arguments, politics is intruding. Food export controls have been imposed by Russia, China, India, Vietnam, Argentina, and Serbia. We are disturbingly close to a chain reaction that could shatter our assumptions about food security.