Careful examination of numerous fluted spear points found in Alaska and western Canada prove that the Ice Age peopling of the Americas was much more complex than previously believed.
Researchers have evidence that an extinct species of monitor lizard had four eyes, a first among known jawed vertebrates. Today, only the jawless lampreys have four eyes.
The amount of plastic in the ocean is set to triple in a decade unless litter is curbed, a major report has warned.
A telescope to study the atmospheres of planets beyond our Solar System will be launched by the European Space Agency in the late 2020s.
Salts left over from ancient seawater reveal new information about the oxygenation of the Earth's atmosphere more than 2 billion years ago.
An analysis of 115,000-year-old bone tools discovered in China suggests that the toolmaking techniques mastered by prehistoric humans there were more sophisticated than previously thought.
Architectural investigations of the Grand Plaza resulted in the unexpected discovery of a large epidemic cemetery associated with the 1545-1550 cocoliztli epidemic. The cemetery was found to contain numerous mass burials, attesting to the catastrophic nature of the epidemic.