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Whether it's a jungle hut or a high-rise apartment, your home is covered in bacteria, and new research from the Amazon suggests city dwellers might want to open a window.
Guest lineups for the Sunday TV news shows:
Mitt Romney, the 2012 Republican presidential candidate, offered this year's hopefuls advice about a hard-learned lesson: Release your tax returns before the primaries and avoid tough scrutiny later. But the top three Republicans leading in national polls don't appear to be listening.
Serious issues face Saturday night's Republican presidential debaters in South Carolina, a state with deep-rooted military culture and home to a mass murder at Emanuel AME Church in Charleston. But style is going to beg for attention alongside pressing matters of policy.
Marco Rubio enters Saturday night's Republican presidential debate facing immense pressure to right his campaign after faltering badly in the last contest and finishing a disappointing fifth in New Hampshire.