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Study Questions Long-Held Views on Stone Age Tools

Innovative Stone Age tools may have been developed by people in Eurasia and -- contrary to widely held views -- not just invented in Africa, a study published Thursday found.

Research published in the journal Science shows evidence that refined stone weapons were developed in Armenia about 325,000 years ago, challenging the theory held by many archaeologists that such technology came from Africa then spread to Eurasia as the human population expanded.

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'Crazy' Climate Forces Colombian Farmers to Adapt

Once upon a time, farming was a blissfully low-tech business on Colombia's northern plains.

The lush tropical climate allowed rice farmers to harvest two or three times a year and protect their crops using little more than scarecrows and slingshots to fend off hungry birds.

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Climate: Now to Turn Summit rose into Action

Having renewed their commitment to saving Earth's climate, governments face daunting challenges in the coming months to draft a global pact and set targets for slashing carbon emissions, analysts said Wednesday.

Important signals went out Tuesday from a special summit of political leaders and corporate bosses hosted by U.N. chief Ban Ki-moon in New York.

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India's Spacecraft Beams Back First Mars Photos

India's spacecraft has beamed back its first photos of Mars, showing its crater-marked surface, as the country glowed with pride Thursday after winning Asia's race to the Red Planet.

The Indian Space Research Organisation (ISRO) uploaded one of the photos onto its Facebook page, showing an orange surface and dark holes, taken from a height of 7,300 kilometers (4,536 miles).

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U.N. Climate Fund Still Far Short of Goal

A new climate fund has received pledges of $2.3 billion, including a billion each from Germany and France, U.N. chief Ban Ki-moon said Tuesday, but the figure remained far below the goal.

The Green Climate Fund, which aims to help poor nations worst hit by rising temperatures and disasters, aims to raise $10 billion by the end of the year to start operations, with the total rising to $100 billion annually by 2020.

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Joy for India as Mars Mission Enters Orbit

India became the first nation to reach Mars on its maiden attempt Wednesday when its low-cost Mangalyaan spacecraft successfully entered orbit around the Red Planet after a 10-month journey.

"India has successfully reached Mars... History has been created today," a jubilant Prime Minister Narendra Modi said from mission control after entry into orbit was confirmed at 8:02am (0232 GMT).

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Ice in Arctic Seas Shrinks to 6th-Lowest Recorded

Ice in Arctic seas shrank this summer to the sixth lowest level in 36 years of monitoring.

The National Snow and Ice Data Center reported Monday that the ice reached its seasonal minimum on Sept. 17 of 1.94 million square miles. That's down a bit from 2013, but not near as low as the record-setting 2012. It is still 19 percent below average.

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Fossil Fuel Divestment Brightens Climate Summit

The Rockefellers, the first family of oil, said Monday they would divest from fossil fuels in a fresh boost for the fight against climate change ahead of a U.N. summit.

Britain also pledged new aid to tackle deforestation, a key contributor to climate change, a day after tens of thousands marched around the world to urge world leaders to do more to address the environmental crisis.

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World Leaders Urged to Change Course at U.N. Climate Summit

The largest gathering of world leaders on climate change opens at the United Nations on Tuesday amid calls for action to put the planet on course toward reversing global warming.

U.N. Secretary General Ban Ki-moon is hosting the summit of 120 leaders, the first high-level gathering since the Copenhagen conference on climate change ended in disarray in 2009.

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SpaceX Cargo Capsule Nears International Space Station

SpaceX's unmanned Dragon spacecraft was nearing the International Space Station on Tuesday with a cargo of supplies, including freeze-dried meals, 20 live lab mice and a 3D printer.

Astronauts at the orbiting lab are scheduled to reach out with the space station's robotic arm to grasp the Dragon at 7:04 am (1104 GMT), NASA said.

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