A new search has begun at a Greek island where an ancient device known as the world's "oldest computer" was found over a century ago, an official said Thursday, adding that other discoveries were possible.

Archaeologists this week returned to Antikythera, the Aegean Sea island where sponge divers in 1900-1901 found the so-called Antikythera Mechanism, a remarkable 2nd-century BCE device that tracked the cycles of the solar system.

Australia on Friday unveiled a colossal radio telescope that will allow astronomers to detect distant galaxies and explore the depths of the universe with unprecedented precision.

The Australian SKA Pathfinder telescope, at the remote Murchison Radio-astronomy Observatory in the Western Australian desert, is made up of 36 antennas, each 12 meters (40 feet) in diameter.

An 11-year-old boy from a nomadic family in Russia's north has stumbled upon a massive well-preserved woolly mammoth, in what scientists describe as the best such discovery since 1901.

Yevgeny Salinder, whose family lives near a polar station in the northern Taimyr Peninsula, discovered the frozen prehistoric animal when he was strolling along the banks of the Yenisei River in late August.

U.S. firm SpaceX aims for its next big launch into orbit Sunday -- the first of 12 flights in its $1.6 billion contract with NASA to bring supplies to and from the international space station.

The launch is the next step in American efforts to commercialize the space industry, in the hope of keeping down costs and spreading them among a wider group than governments alone.

Poland sold €40 million ($52 million) worth of CO2 emission rights to Spain on Thursday after successfully bringing its emissions below required limits.

Environment Minister Marcin Korolec and Spain's high official for the environment, Federico Ramos, signed the deal in the ornate 18th century palace of the Lazienki Park, a popular tourist venue.

The World Bank's new president said that he intends to make the impact of global warming on the poor a major theme of his work at the lending institution.

Jim Yong Kim was speaking to reporters ahead of the World Bank's annual meeting in Tokyo this month.

NASA's Mars Curiosity rover is parked at a sand pit and ready to scoop up soil to clean and test its geological sampling hardware, the U.S. space agency said Thursday.

These will be the first solid samples put through Curiosity's high-tech collection and processing tool set -- a task central to realizing the mission's goal of determining whether Mars ever harbored life, NASA officials said.

A palm-sized Japanese satellite in orbit around Earth will flash a Morse code message that will be visible around the world from next month, the mission commander said Friday.

Researchers hope the satellite, measuring 10 centimeters (four inches) cubed and launched from the International Space Station on Friday, will become the first orbiter to transmit an LED message across the night sky.

A Puerto Rican frog about the size of a peanut received federal protection Wednesday, ending a long battle to list it as an endangered species.

The habitat of the coqui llanero, which is the island's smallest tree frog, also received federal protection, covering 615 acres (249 hectares) of freshwater wetland in northern Puerto Rico.

Australian Environment Minister Tony Burke Thursday hit out at Japan's "alleged" scientific whaling as researchers hailed the testing of new acoustic tracking technology for the endangered blue whale.

Burke was given a demonstration of the science in the city of Hobart, where he applauded the innovation and dedication of those working to find out more about the threatened species -- the largest animal that has ever lived.