Prairie dogs may be able to tell you about a hawk that's circling overhead right now, but they never show any inclination to describe the one they saw last week.
By the sixteenth century, the Incas of South America ruled an empire that extended along the Pacific coast and Andean highlands from what is now Ecuador to central Chile.
The southern frontier of the desert was far to the north of where it is now, while semiarid grassland and shallow freshwater lakes covered much of what are now arid plains.
He now covers all technology, media, news services, sales, content and heads up the team that developed (among many other things) QVC's interactive TV operations on Sky and Freeview.
In another case, American archaeologists Rene Million and George Cowgill spent years systematically mapping the entire city of Teotihuacan in the valley of Mexico near what is now Mexico City.
However, Jupiter's largest moon Ganymede will appear on the same side of Jupiter as Io and Europa, though at some 3 times farther out from the Jovian disk.