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- Sweet Confusion: Does high fructose corn syrup deserve such a bad rap?
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- Better chow yields more milk: A more nutritious form of corn for dairy cows boosts farm profits, teen investigator finds
- Fuzzy future: Kids may suffer impaired vision from spending too little time outdoors, studies suggest
- Building with moon rocks: Working on the moon with lunar soil and grit could prove easier, more efficient and less costly than using earthly materials
THREE VIEWS
View larger image | In what has been the dominant model of human evolution (left), Homo sapiens evolved in Africa and spread across the globe, replacing other Homo populations. With evidence of interbreeding, though, alternative models may get more attention: In one view (center), ancient populations assimilated with a more modern version. Another (right) holds that an abundance of interbreeding kept all groups as part of one species.
Credit: M. Stoneking/EMBO Reports 2008
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