It can tell us about vegetation, climate and even human activity through time. Pollen grains are far more than allergens — ...

If you are sneezing this spring, you are not alone. Every year, plants release billions of pollen grains into the air, specks ...

Scientists in Guatemala have discovered "the first freeway ... technique — to reveal the finest details, such as ancient vegetation. It allowed the scientists to see ancient dams, reservoirs ...

which is equivalent to the emissions from 116 coal-fired power plants, experts say. A recent video of the Rio Motagua in Guatemala shows a dystopian landscape — the sound of piles of plastic ...

Deep in the jungle in the north of Guatemala, along deep-rutted 4x4 tracks, the pyramids of the great Maya city of Xultún are hidden under heavy vegetation and oddly symmetrical hills.