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More than 20 days after MH370 went missing, search teams have still not discovered any sight of debris in the southern Indian Ocean - and many are now questioning if the plane parts might have sunk, making the search that much more difficult. CNN's Rene Marsh examines whether such debris from a plane would normally sink or float.
A measles-like virus could be responsible for the deaths of hundreds of bottlenose dolphins along the East Coast - an unusual spike that has scientists concerned.
Holy bloody shark – a tale of two fish-snatchings. CNN's Jeanne Moos reports.
CNN's Brian Todd reports on additional sightings of great white sharks off Cape Cod – and what they mean.
CNN's Brian Todd reports on recent sightings of great white sharks off Cape Cod.
John Zarrella reports a lifeguard fired for ignoring protocol to rescue a swimmer says he has been offered his job back.
RELATED STORY: Florida lifeguard says he's been offered his job back