Team Studying Global Warming Still Trapped in Ice

Fifty-two scientists and tourists rescued from a trapped vessel in the Antarctic still can't get home.

On Thursday, a helicopter flew the stranded passengers off the icepack in groups of 10 and 12. Their ship had been trapped in the ice for more than 10 days.

Now, they're stuck again, this time because the Chinese icebreaker that sent the helicopter fears it could get stuck as well.  

The Australian ship meant to carry the passengers home is hanging around in case it's needed to rescue the Chinese.

One other irony to this story: the team of explorers and scientists trapped by the ice was on an expedition to study the effects of climate change in the South Pole.

Many climate change activists believe global warming is causing ice to melt at the poles.