The Cassini probe zipped through the icy plumes of Enceladus Wednesday, looking for evidence that the moon's hidden sea is habitable. The search for life in the solar system is increasingly pointing to new and less-accessible destinations.
Even after giving birth to 100 million trillion Earth-mass planets in the habitable zones of host stars, the cosmos has the raw material to produce more than 10 times that number, according to a new study.
The Enceladus Life Finder mission, involving a small orbiter, would sample the Saturn moon's geyser-like plumes for evidence of habitability and perhaps life. New data point to a global ocean beneath Enceladus' icy crust.
Scientists have found evidence that human relatives perhaps 2 million years old used a burial chamber for the dead – a practice thought to be only 350,000 years old. It's one remarkable aspect of a remarkable find.
Later this week, mission scientists are expected to publicly unveil the first images in what is expected to be a 15-month flow of data from the New Horizons spacecraft, following its flyby of Pluto in July.
Conservation has long been about protecting communities of plants and animals where they are. But climate change is leading to a nascent form of conservation that embraces change and seeks to provide a thriving stage on which it can happen.
A mine-water blowout fouled the Animas and San Juan Rivers in Colorado with toxic metals. Water quality is returning, but the long-range harm to aquatic life – fish and the insects they feed on – remains a concern.
The EPA's accidental release of 3 million gallons of contaminated water into the Animas River may provide a 'Cuyahoga River moment' in the region's struggle to deal with water pollution from abandoned hard-rock mines.
The climate change plan announced by the Obama administration Monday is not as aggressive as plans by some other countries. But it suggests the US is serious about the issue and gives the country new credibility in climate talks.
A new strain of rice produces more and larger grains and reduces methane emissions from rice farming, perhaps the largest human-based source of the greenhouse gas. But it's genetically modified, which could lead to a backlash.