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A polar bear at SeaWorld unexpectedly died after she was separated from her longtime female partner.
From the Washington Monument to Germany's Brandenburg Gate and even to Greenland, scientists, students and research advocates rallied on an often soggy Earth Day.
Decades' worth of man-made junk is cluttering up Earth's orbit, posing a threat to spaceflight and the satellites we rely on for weather reports, air travel and global communications.
China on Thursday launched its first unmanned cargo spacecraft on a mission to dock with the country's space station, marking further progress in the ambitious Chinese space program.
The Earth will have a close encounter Wednesday with a massive asteroid nicknamed "The Rock."
A man who has spent 23 years in an Ohio prison for his girlfriend's slaying but maintains his innocence could be released soon after the new county prosecutor in Cleveland asked a court to void his conviction.
On April 22nd, Earth Day Network (EDN), global coordinator for Earth Day, is launching its Earth Day 2017 three-year campaign for Environmental & Climate Literacy.
Thousands of bacteria-infected mosquitoes were released in the wild Tuesday near Key West, testing a new way to kill mosquitoes that carry Zika and other viruses.
A giant aquifer below an eastern Idaho federal nuclear facility is as free of radioactive contamination and other pollutants as it has been in more than six decades of monitoring but the water level of the aquifer is at its lowest ever recorded.
Deep in the jagged red mountains of Oman, geologists are searching for an efficient and cheap way to remove carbon dioxide from the air and oceans - and perhaps begin to reverse climate change.
Should middle-aged men get routine blood tests for prostate cancer? An influential health panel that once said no now says maybe. It says certain men may benefit as long as they understand the potential harms.
Soeckchen the secretary bird is now strutting around her home in northern Germany with an artificial leg produced using a 3-D printer.
Since the project began in 2014, about 130 people have come to events, resulting in the digital preservation of more than 600 items and the creation of about 150 profiles of people who took part in the war effort.
As tourism surges in Iceland, many visitors don't realize a large volcano is due to erupt.
On an island about halfway between Oslo and the North Pole is the Svalbard Global Seed Vault, an international effort to safeguard the sources of the world's food supply.
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