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WWF: Tiger Campaign Threatened by Poor Data

Efforts to save the tiger are being undermined by a lack of information about how many of the endangered cats live in the wild, the conservation group WWF said on Tuesday.

In 2010, a "tiger summit" in St. Petersburg, Russia, set the goal of doubling the number of wild tigers by 2022, against a baseline population believed at the time to be as few as 3,200.

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NASA Rover Breaks Out-of-this-World Distance Record

The U.S. space agency's Opportunity rover has now clocked more miles on Mars than any man-made vehicle to reach another celestial body, NASA said Monday.

Since arriving on the Red Planet in 2004, the solar-powered robot has journeyed across 25 miles (40 kilometers) of Martian terrain.

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U.S. Exports Help Germany Increase Coal, Pollution

One of Germany's newest coal-fired power plants rises here from the banks of a 100-year-old canal that once shipped coal mined from the Ruhr Valley to the world.

Now the coal comes the other way.

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German Scientist Starts Four-Week Swim down Rhine River

A German chemistry professor started on Monday a grueling four-week solo swim down the Rhine river for the benefit of science and the environment.

Self-confessed "mad professor" Andreas Fath, who set off on his 1,231-kilometer (764-mile) adventure with a splash into Switzerland's Lake Toma, plans to swim through Germany and France to reach the river's mouth at the Dutch port of Rotterdam on August 24.

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World's Largest Solar Boat on Greek Prehistoric Mission

The world's largest solar boat, the catamaran PlanetSolar, will embark on a Greek mission to find one of the oldest sites inhabited by man in Europe, an organizer said Monday.

Starting on August 11, a team of Swiss and Greek scientists will seek a "prehistoric countryside" in the southeastern Peloponnese peninsula, University of Geneva researcher Julien Beck told Agence France Presse.

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Scientists: Fist Bumps more Hygienic than Handshakes

Fist bumps are more hygienic than handshakes and drastically reduce the risk of spreading infectious diseases, researchers in Britain have found.

The study discovered that a handshake transfers 10 times as much bacteria as a fist bump, following a series of tests at Aberystwyth University on the west coast of Wales.

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End Dawns for Europe's Space Cargo Delivery Role

Europe will close an important chapter in its space flight history Tuesday, launching the fifth and final robot ship it had pledged for lifeline deliveries to the International Space Station.

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Giant Anteaters Kill Two Hunters in Brazil

Giant anteaters in Brazil have killed two hunters in separate incidents, raising concerns about the animals' loss of habitat and the growing risk of dangerous encounters with people, researchers said.

The long-nosed, hairy mammals are not typically aggressive toward people and are considered a vulnerable species by the International Union for the Conservation of Nature (IUCN), largely due to deforestation and human settlements that encroach on their territory.

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Giant Crater in Russia's Far North Sparks Mystery

A vast crater discovered in a remote region of Siberia known to locals as "the end of the world" is causing a sensation in Russia, with a group of scientists being sent to investigate.

The giant hole in the remote energy-rich Yamalo-Nenetsky region first came to light in a video uploaded to YouTube that has since been viewed more than seven million times.

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Dinosaur Tracks Suggest Tyrannosaurs Hunted in Packs

Some 70 million years ago, three tyrannosaurs stalked together across a mud flat in Canada, possibly searching for prey.

The new insight comes from several parallel tyrannosaur tracks unearthed in Canada. The dinosaur tracks provide stronger evidence for a controversial theory: That the fearsome mega-predators hunted in packs.

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