saba berhie

The American soldier may soon have a personal combat-ready sidekick that will fetch him essentials such as water, ammo and medicine and provide extra firepower when hes under attack. Its a robotic servant dubbed BirdDog thats in the works by the U.S. Navy and the private research firm Science Applications International Corporation. BirdDog is designed to complement the militarys future fleet of unmanned vehicles, which are expected to account for one third of all ground combat vehicles by 2015.

One common complaint about wind turbines is that they blemish the scenic countrysides and coastlines where they perch. Now an architect in London has an attractive solution. The wind dam, a giant swath of fabric connected to a turbine, looks more like a Christo art installation than a power generator.

Welcome to the preys-eye view of the three-spined stickleback. Mark Purnell, a research fellow at the University of Leicester in England, stained the fish to highlight the skeleton and examined surface textures on the teeth. Each tooth is about the width of a human hair, and its texture indicates what the fish ate.

In the international alliance to fight climate change, the United States is considered the sullen loner. But in the seven years since we rejected Kyoto, changes have begun. Not at the federal level, however. Its the locals who are making it happen.