Climate scientists step up search for 'holy grail' of million-year-old ice

Ice core records going back 800,000 years reveal a lot about carbon dioxide and temperature, but climate researchers want to go back further

Somewhere deep below the ice in Antarctica lies a time capsule. It's the holy grail of climate science and promises to reveal the past and future of Earth's atmosphere. And right now, scientists are meeting in Hobart to work out a plan to dig it up.

We're pretty sure there is ice one million years old or older towards the bottom of the Antarctic ice sheet