A hill in southeastern Bolivia is crisscrossed by fossilized dinosaur tracks -- a total of more than 5,000 footprints, some more than a meter long, dating back 65 million years. 

At least 35,000 walruses have beached themselves on a remote Alaskan coastline in a phenomenon blamed on the melting of arctic ice due to climate change, experts said Wednesday.

Initially there had been only 1,500 of the tusked pinnipeds counted on one beach, but in recent days that number has exploded.

To the world, the Great Barrier Reef is a natural wonder and vast underwater kingdom, boasting some of the rarest animals and plants. To Aboriginal Australian Gavin Singleton, it is home.

The 26-year-old's family history -- off the reef to the far northeast coast of the continent -- goes back thousands of years.

Scientists looking at 16 cases of wild weather around the world last year see the fingerprints of man-made global warming on more than half of them.

Researchers found that climate change increased the odds of nine extremes: Heat waves in Australia, Europe, China, Japan and Korea, intense rain in parts of the United States and India, and severe droughts in California and New Zealand. The California drought, though, comes with an asterisk.

The Academy of Motion Picture Arts and Sciences is holding its first exhibit in the space that will become Hollywood's premier museum devoted to the movies.

"Hollywood Costume" opens Thursday inside the historic May Co. building on Wilshire Boulevard in Los Angeles, which is set to reopen as the Academy Museum of Motion Pictures in 2017.

Warm ocean temperatures have caused large expanses of coral to bleach in the pristine reefs northwest of Hawaii's main islands, scientists said Tuesday.

Mass bleaching has occurred at Lisianski atoll, about 1,000 miles (1,600 kilometers) northwest of Honolulu, said Courtney Couch, a researcher at the Hawaii Institute of Marine Biology. Coral also bleached at Midway, Pearl and Hermes atolls, but not as severely.

The United States and India, fresh from sending their own respective spacecraft into Mars' orbit earlier this month, on Tuesday agreed to cooperate on future exploration of the Red Planet.

Two deals were signed during a meeting in Toronto, Canada, between NASA administrator Charles Bolden and Chairman K. Radhakrishnan of the Indian Space Research Organization.

The sudden eruption of Mount Ontake over the weekend, which is believed to have killed at least 31 people, was a reminder of Japan's vulnerability to its many active volcanoes.

Gas continued to pour from the ruptured crater Monday, as emergency workers tried to reach the bodies of hikers trapped on the peak when it spat into life.

A Indian man throws a rope as he and others riding a gondola cross the Alaknanda river from the Hemkund Sikh temple to Govindghat following flash floods in Uttarkhand state on June 30, 2013View Photo

A Indian man throws a rope as he and others riding a gondola cross the Alaknanda …

World lenders should set up a "Global Mangrove Fund" to protect these hotspots of biodiversity and vital sources of income, the UN Environment Program (UNEP) said on Monday.

More than a quarter of the world's mangroves have already been lost, and the current rate of destruction is more than triple that of land forests, it said.