Reservoirs within the coronary heart of an historical Maya metropolis had been so polluted with mercury and algae that the water seemingly was undrinkable. Researchers discovered poisonous ranges of air pollution in two central reservoirs in Tikal, an historical Maya metropolis that dates again to the third century B.C. in ...

Sled canine are a lot older and have tailored to Arctic circumstances a lot sooner than beforehand thought. Researchers present that ancestors of contemporary sled canine have labored and lived with people for over 9,500 years.

Right now's trendy cities, from Denver to Dubai, might study a factor or two from the traditional Pueblo communities that when stretched throughout the southwestern United States. For starters, the extra individuals reside collectively, the higher the residing requirements.

A small fowl carving - -the oldest occasion of East Asian three-dimensional artwork ever found -- is described in a brand new research.

Researchers have studied presolar supplies that landed on a planet-like physique. Their findings might assist resolve the thriller: the place did all of the water on Earth come from?

A global crew of researchers investigated the earliest people in Central America and the way they tailored over time to new and altering environments, and the way these adjustments have affected human life histories and societies.

Researchers have found a brand new migration sample (or lack of) at Pinnacle Level, a now-submerged area in South Africa. Whereas it was first believed giant omnivores would journey to observe the expansion of vegetation to outlive, our researcher got here to a totally new conclusion by means of finding ...

Why do carbon dioxide ranges within the ambiance wax and wane together with the nice and cozy and chilly durations of Earth's previous? Scientists have been attempting to reply this query for a few years, and because of chemical clues left in sediment cores extracted from deep within the ocean ...

By finding out the chemical parts on Mars immediately -- together with carbon and oxygen -- scientists can work backwards to piece collectively the historical past of a planet that when had the situations essential to help life.

A brand new examine by paleontologists exhibits that one kind of historical reptiles developed a particular kind of tooth enamel, much like that of mammals, with excessive resistance to put on and tear. The examine is the primary to report this type of enamel in a fossil reptile.