Tsunami warning issued as quake hits southern Indian Ocean

A shallow 6.4-magnitude earthquake hit the southern Indian Ocean today, US seismologists said, prompting Australia to issue a tsunami warning which was later cancelled.

Planes, ships chase new leads in search for Malaysian jet

New satellite images have revealed more than 100 objects in the southern Indian Ocean that could be debris from a Malaysian jetliner missing for 18 days, while planes scouring the frigid seas on Wednesday also reported seeing potential wreckage.

Southern Ocean humpbacks sing different tunes

Scientists have found that humpback whales on both sides of the southern Indian Ocean sing different tunes.