New evidence confirms a critical theory of how the planets in our solar system behave in their orbits around the sun, producing big changes in Earth's climate.
“Why is there oxygen in the atmosphere?" asks researcher Shanan Peters. The high school explanation is 'photosynthesis.' But we’ve known for a long time ... that building up oxygen requires the formation of rocks like black shale."
As scientists continue finding evidence for life in the ocean more than 3 billion years ago, those ancient fossils pose a paradox that raises questions about whether there was more land mass than previously thought.
In molten sandstone extracted by prospectors a century ago, an international team of scientists has discovered microscopic crystals telling of unimaginable pressures and temperatures when an asteroid formed Meteor Crater in northern Arizona some 49,000 years ago.
The dramatic finding rested on a simple, painstaking study of the ancient lakeshore, which resembles a bathtub ring.
Of all the places Sierra Swenson expected to end up during her first semester at college, precious few were lined with jars full of preserved reptiles.
With the help of a solitary sea squirt, scientists have resolved the longstanding puzzle of the crystal structure of vaterite, an enigmatic geologic mineral and biomineral.