Could lumpy metallic rocks in the deepest, darkest reaches of the ocean be making oxygen in the absence of sunlight?This cast doubt on the long-established view that life was made possible when organisms started producing oxygen via photosynthesis, which requires sunlight, about 2.7 billion years ago.
The average life expectancy in the U.S. is just over 78 years — but in certain areas of the world, more people make it past 100. Researcher Dan Buettner shares their secrets....