Researchers are probing the forest to see if humans ever lived there.
The man suffered five blows to the head during a violent murder.
Researchers think the woman's burial position shows that the people of the time performed burial procedures.
Experts have uncovered stone wall structures that date back 5,000 to 8,000 years and 3,000-year-old irrigation canals.
If confirmed, the find would be "a historic event" worthy of international attention, one minister said.
Soil found in Fermanagh, Northern Ireland, had long been reputed to have healing properties.
The 4,000-year-old mounds cover an area the size of Idaho.
The woman was buried with ostrich egg beads and pottery.
Almost a gallon of pungent clear yellow fluid was discovered in an ancient bronze pot.
One survey author said that the discovery is like "putting on glasses when your eyesight is blurry."
Brazilian President Michel Temer called the loss of much the National Museum's 20 million items "a sad day for all Brazilians."
Scientists named them Xenomorphia, after the bloodthirsty, chest-splitting creatures from the Alien movies.
The foal was discovered in the ice of Siberia's "mouth of hell."
"This is the first time that any salmonella has been found in old human remains in Europe," one researcher said.
It's not quite Jurassic Park, but the finds reveal "critical" clues about the evolutionary history of the slithery beasts.
"If you were living in Africa three million years ago...without any means of defense, you'd better be able get up in a tree when the sun goes down."
The operations in the ancient Incan world were more successful than those during the American Civil War.
The ancient stools provide insights into parasitism, diet and subsistence patterns of past populations.