Scientists know the Earth’s magnetic poles are getting ready to flip, so they plan to study an ice core shipped from Antarctica that can tell them what happened to the Earth the last time this occurred. They’ll also be able to find out what the climate was like the last time Earth was in its current orbit?without the global warming caused by manmade pollution. This will tell them how much of the current warming is natural, and how much has been caused by us.
Magdeline Pokar writes in New Scientist that the ice core dates back at least 750,000 years, making it the oldest continuous ice core ever drilled. The gases and particles trapped in the layers of the ice reveal information about the Earth’s climate and atmosphere, including periods of global warming.