This is the story of two continents doing battle, North America versus South America. It is also a biological mystery.
For a very long time, North America and South America were separate land masses. The Pacific Ocean slipped between them, flowing into the Caribbean. The Isthmus of Panama was there, but it was underwater. The two continents didn't touch.
There's a gift in cancer. It says so right on page 203 of Greg Anderson's book Cancer: 50 Essential Things to Do (2013 edition; first published 1993). Anderson quotes the singer Olivia Newton-John as saying this about her "journey through breast cancer": "I see it [cancer] as a gift. I know it sounds strange. But I don't think I would have grown in the areas I did without this experience."
Then Anderson urges his readers to "Seek the gift in cancer. It's there."
Since the 1930s, Louisiana has lost roughly as much land as makes up the state of Delaware.
"If you put the state of Delaware between New Orleans and the ocean, we wouldn't need any levees at all," says John Barry, vice president of the Southeast Louisiana Flood Protection Authority-East. "There is this large buffer of land that has disappeared, and that buffer makes New Orleans much more vulnerable to hurricanes."
If you want to protect rare species, first you have to find them. In the past few years, biologists have developed a powerful new tool to do that. They've discovered that they can often find traces of animal DNA in streams, ponds — even oceans.
The idea took root just five years ago, when biologists in France found they could detect invasive American bullfrogs simply by sampling pond water and looking for an exact genetic match to the frogs' DNA.
In general terms, there are two eras that characterize the 200,000 years or so of human presence on Earth: first, and for most of this time, the hunter-gatherers, nomadic groups that roamed the land in search of food and shelter. Then came what we call "civilization," product of the fixation of larger groups around fertile areas. Presumably, the first were the Natufians some time around 10,000 BCE, along the swath of land between Israel and Jordan.
Professor William Barklow was on vacation when this happened. He was in Tanzania sitting on a river bank gazing about, when all of a sudden a hippopotamus pushed its head out of the river right in front of him, opened its huge mouth and bellowed.
It was really loud. Barklow could feel sound waves hitting his chest, his neck; he could hear the cry echoing along the riverbank. He knew next to nothing about hippos being himself a bird man, a specialist on the North American loon, but he was intrigued by what happened next.
The racial wage gap in the United States — the gap in salary between whites and blacks with similar levels of education and experience — is shaped by geography, according to new social science research.
The larger the city, the larger the racial wage gap, according to researchers Elizabeth Ananat, Shihe Fu and Stephen L. Ross, whose findings were recently published by the National Bureau of Economic Research.