Urban areas are currently responsible for ~70% of the global energy-related carbon dioxide (CO2) emissions, and rapid ongoing global urbanization is increasing the number and size of cities. Thus, understanding city-scale CO2 emissions and how they vary between cities with different urban densities is a critical task. While the relationship …
it is time to take out sun creams, ultraviolet protective sunglasses, wide brimmed hats and clothing with long sleeves because the largest ever ozone hole over Antarctica has just been detected by the us National Aeronautics and Space Administration ( nasa) . The ozone hole over the Antarctic is the …
This year, South African forests could face fires which will be twice as fierce as the usual ones, indicates a field experiment, which was supported by the National Aeronautical and Space Administration ( nasa ). During the experiment, thickness of the smoke plumes were measured, movements of large plumes were …
The Galileo spacecraft launched in 1989 to survey Jupiter and four of its moons may be close to a fiery end. A NASA (National Aeronautic and Space Administration) panel has recommended that the spacecraft be allowed to crash into Jupiter's atmosphere in December 2002. This is to prevent it from …
global warming is responsible for melting more than 50 billion tonnes of water per year from the Greenland ice sheet, leading to a 59 centimetres rise in global sea level over the last century. This was stated in a National Aeronautical and Space Administration ( nasa ) study, which is …
Following two winters of low ozone loss in the stratosphere, the Arctic is likely to have experienced record ozone destruction. The ozone layer thins out during spring but so far has never disappeared. Ozone losses of more than 60 per cent have occured at altitudes of around 18 km. This …
The space shuttle Endeavour has captured every corner of the Earth in amazing three-dimensional images. For 11 days, beginning January 31, the globe was swathed by radar waves so that scientists from National Aeronautics and Space Administration (NASA) in the US could obtain data for the most complete high-resolution maps …
a specially designed satellite of the us National Space and Aeronautical Administration ( nasa ) has tracked the electrons moving out from the Earth's poles. These electrons are believed to be the cause of the mysterious "dark aurora' that breaks up the curtains of light in the auroral displays. Aurora …
According to the panel commissioned by the National Space and Aeronautic Administration (NASA) to find out what went wrong with the Mars Polar Lander, has said that a confused sensor may have led the lander crashing into the Red Planet. NASA lost contact with the Mars Polar Lander on December …
Supernovae are among the most spectacular events in our Universe. In a very short period, a star gives out energy that is equivalent to the energy given out by a whole galaxy. Unfortunately, our knowledge about the violent processes druing a supernova is still very sketchy. Now, astronomers have put …
If a team of scientists are to be believed, it will rain even in the desert. A joint project of National Aeronautics and Space Research, USA, and the Israel Space Agency say seeding clouds with silver iodide can enhance precipitation by up to 13-14 per cent. "We can produce giant …
The Chandra space observatory, launched last month by the US National Aeronautical and Space Administration, has already started transmitting images. It has sent images of the heart of the Crab Nebula, a star that exploded in the 11 century, which was recorded by Chinese astronomers. The images show energetic material …
Power for spaceships from astronaut waste? Unbelievable but true. It won't be long before astronauts make a significant contribution towards replenishing depleted power sources on board a spacecraft: faeces and other solid wastes. Scientists from National Aeronautics and Space Administration (nasa) in the US have enlisted the support of Advanced …
The us National Aeronautics and Space Administration (Nasa) has scrapped its high-speed research programme aimed at creating a new supersonic transport. The project's chances looked good until last summer, when Boeing released a new study that showed a supersonic airliner would be much harder to build than expected. Instead of …
watch out, felons. A promising, new technology developed by National Aeronautics and Space Administration ( nasa ) could go a long way in helping law enforcement agencies analyse crime-scene evidence to catch you. nasa 's Marshall Space Flight Center in Huntsville, Atlanta, has demonstrated software that enhances and improves dark, …
the us National Aeronautics and Space Administration ( nasa ) plans to launch its biggest space telescope that will be named Chandra (after the India-born scientist S Chandrasekhar) in July 1999. Its specific objective will be "to unravel the mysteries of the evolution of the Universe'. The sheer size and …
owls are providing scientists with tips on improving the design of the Stealth aircraft. The winged predators could provide clues to reducing noise in future aircraft. The prey of owls
technology is finally catching up with what science fiction authors had written some five decades ago. Back then, no self-respecting science fiction author and would be caught dead without one or more (preferably more) anti-gravity device in their plots. According to recent reports, the us National Aeronautics and Space Administration …
artificial muscles that give space robots animal-like flexibility and manipulation ability will be tested on a small nasa rover destined to explore an asteroid. The artificial muscles were developed by Yoseph Bar-Cohen and his team at nasa 's Jet Propulsion Laboratory, Pasadena, usa. The muscles are based on a simple, …
what can dock the space shuttle and spot a brain tumour? Not a medically-qualified astronaut but a neural networking computer algorithm designed by engineers at the us National Aeronautics and Space Administration ( nasa ). The system has become so adept at analysing the large amount of data needed to …
