Iridium is normally rare at the earth's surface, but it is more abundant in meteorites.
Does this cast doubt on the data which show warming at the earth's surface?
WWF, meanwhile, looked at conditions at the Earth's other climatic extreme - the cold of the Antarctic peninsula.
This country made the proposal to launch a United Nations Decade for Education for Sustainable Development at the Earth Summit in Johannesburg in 2002.
Japan made the proposal to launch a United Nations Decade devoted to Education for Sustainable Development at the Earth Summit in Johannesburg in 2002.
At this moment I wasn't just looking down at the Earth but I was looking at a planet hanging in the blackness of space.
Spanning both popular and exotic geographic locations, DAYDREAM delivers stunning visual 3D imagery, offering viewers an immersive look at the earth and mankind's most spectacular creations.
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Most scientists on both sides agree we are near the half precession point and solar energy at the earth surface in high summer at 65N is declining.
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At the Stockholm environment summit of 1972 - the world's first - and at the Earth Summit here in 1992, the activists' gatherings were acknowledged as the conscience of the meeting.
Dr Newman and his colleague, Dr Christina D Buesching, will be making a presentation about the role of volunteers within science at the Earth Institute's annual lecture at the Royal Geographical Society on Thursday evening.
"When you replace soil and grass with concrete and asphalt, you alter the balance of energy that occurs at the earth's surface, " says Dr. Robert Bornstein, a professor of meteorology at San Jose State University in California.
The rebuilding effort also represented a chance to create infrastructure improvements that would have helped the economy directly, such as investments in transportation, water and power systems, according to Arthur Levner-Lam, director of the hazard center at the Earth Institute at Columbia University.
Two thousand years hence, Sherwood says hypothesized collections of Asteroidal materials congregating at the Earth-Sun L4 and L5 gravitational equilibrium points would make for building materials to construct a large rotating pancake disk capable of housing thousands of people in the comfort of a free-breathing atmosphere and some form of artificial gravity.
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Listen online or download the podcast at the Costing the Earth website.
And when the solar wind is stronger, it is better at shielding the earth from high-energy charged particles from outer space known as cosmic rays.
The Ulsterman, who needs a top three finish at the 'Earth' course in Dubai to stand any chance of overtaking Germany's Kaymer, finished the day well adrift of the leading pack despite moving to two under par after shooting his lowest round of the tournament.
Dr Victoria Coker will use her For Women In Science Fellowship to support her research at the School of Earth, Atmospheric and Environmental Sciences at the University of Manchester.
Dr Victoria Coker Dr Victoria Coker will use her For Women In Science Fellowship to support her research at the School of Earth, Atmospheric and Environmental Sciences at the University of Manchester.
Two years later, at the first Earth Day, its founder predicted that the greatest challenge to the environment would be population growth.
Los Angeles, California (CNN) -- There were several speeches at the first Earth Day -- back in 1970, before the disco era -- on the National Mall.
Critics say America blocked an effort, first mooted at the Stockholm Earth Summit 40 years ago, to make the UN's Environment Programme a fully fledged UN agency.
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The long-lifers' heroes are the likes of John Glenn, who circled the earth at the age of 77, and Goya, who was still painting rather well at 80.
In the early days of oil and gas exploration, geologists would largely rely upon topology at the surface of the earth to interpret the location of oil and gas accumulations in the subsurface.
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The 25-year-old German's wobble has severely reduced his chances of taking the world number one spot from England's Lee Westwood, who is in a share of fifth place at the 'Earth' course after a 71 on Saturday.
There were thousands of people from all over the world circumambulating this sacred structure at the center of the Earth, all there for a common purpose of praising God, yet each engaged in private reflection oblivious of any other.
And the fact that the sun and moon were particularly close to the Earth at precisely the same time -- well, that made the tidal bulges even bigger.
An adventurer from the West Midlands has said he is on schedule to become the first person to ski alone at both of the earth's Poles consecutively.
The Moon's steady gravitational influence keeps the Earth spinning at the right speed and angle to provide the sort of stability necessary for the long and successful development of life.
" Even the barren Moon is essential: "Without the Moon's steadying influence, the Earth would wobble like a dying top.... The Moon's steady gravitational influence keeps the Earth spinning at the right speed and angle to provide the sort of stability necessary for the long and successful development of life.
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