Word: ancestors
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FRANKLIN PIERCE 14th President of the U.S. and punching bag for presidential historians, he is an ancestor of Scott Pierce, Barbara Bush's grandfather...
...little romance. He was born, it is believed, in Siberia, while his father was being trained as a technocrat under Stalin. But his official biography transposes his birth to the slopes of Mount Paektu on the North Korean-Chinese border--for many, the mythical birthplace of the ancestor of the Korean people. Kim's mother died when he was a schoolboy. When the Korean War broke out during his father's rule, he was spirited off to the safety of Manchuria. In the 1960s Kim is believed to have trained as a pilot in East Germany. He returned to North...
Experts in evolution determined decades ago that the human species arose in Africa. Fossil bones found there are far more ancient than human remains found anywhere else. But when and why our ancestors first ventured away from the mother continent to take up residence in other parts of the world have been matters of debate. The conventional wisdom had long held that Homo erectus, the immediate ancestor of Homo sapiens, made the exodus about 1 million years ago, after developing relatively sophisticated stone tools that enabled him to gather food more efficiently during his wanderings...
...Earth. All earthly life shares a remarkably complex set of biochemical features, but does this commonality record the only conceivable building blocks for any entity that we would call "alive"? Or do all earthly creatures share these features only because we have inherited these properties from a common ancestor that used one configuration among a million alternatives unknown to us but quite conceivable and workable? Indeed, would we, in our carbon-based parochialism, even recognize otherworldly forms of life--pulsating sheets of silica, perhaps--well beyond...
Even if you could get past these difficulties, the physics of both types of time machine dictate that you can't go back in time to an epoch before the time machine was created. So you couldn't meet and perhaps kill your own ancestor. But if such a machine were built today, your descendants might come and kill you, changing their own past...