Science

Self-directed microspider could repair blood vessels

Self-directed microspider could repair blood vessels

A new spider-like micromachine could swim through a person’s blood vessels, healing damaged areas and delivering drugs as it goes. Ayusman Sen of Pennsylvania State University in University Park and his colleagues have created the self-propelling microspiders using spheres less than a micrometre wide. Each sphere is made up of two halves – one hemisphere […]

Out of space in outer space: Special report on NASA’s ‘space junk’ plans

Out of space in outer space: Special report on NASA’s ‘space junk’ plans

A 182-page report issued September 1 by the United States National Research Council warns that the amount of debris in space is reaching “a tipping point”, and could cause damage to satellites or spacecraft. The report calls for regulations to reduce the amount of debris, and suggests that scientists increase research into methods to remove […]

NASA gives public new internet tool to explore the solar system

NASA gives public new internet tool to explore the solar system

The “Eyes on the Solar System” interface combines video game technology and NASA data to create an environment for users to ride along with agency spacecraft and explore the cosmos. Screen graphics and information such as planet locations and spacecraft maneuvers use actual space mission data. “This is the first time the public has been able […]

Tesla: Master of Lightning

Nikola Tesla invented or developed many of the electrical technologies which form the basis of modern life, including: alternating-current (AC) power transmission and electric motors; high-frequency (HF) communications, the basis for radio and television; neon lighting; remote radio-control; and X-rays. But his visionary genius and technical skill was countered by his lack of business acumen […]

Your brain chemistry existed before animals did

Your brain chemistry existed before animals did

WHEN wondering about the origins of our brain, don’t look to Homo sapiens, chimpanzees, fish or even worms. Many key components first appeared in single-celled organisms, long before animals, brains and even nerve cells existed. Dirk Fasshauer of the University of Lausanne, Switzerland, and colleagues were studying a pair of essential neural proteins called Munc18/syntaxin1 […]