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Apr 22, 2014 10:50 AM ET // Larry O'Hanlon
A quarter of a billion years ago Africa slammed into North America and left a scar that can be seen today with special instruments.
Nov 21, 2010 10:04 AM ET // Christina Reed
Keeping seafood safe for consumers requires testing imports for unapproved drugs. Should buyers be given the information about the origins of their seafood and make the call themselves?
Jun 2, 2011 12:33 PM ET // Tim Wall
The frequency of tornadoes this year indicates variability in the northward migration of the summer jet stream.