Topic: Michael Mann - CSMonitor.com

Atmospheric carbon dioxide levels reach milestone

A monitoring station in Hawaii has measured carbon dioxide levels of 400 parts per million, a concentration not seen on Earth since the Pleistocene Era.

China temperature spikes linked to burning of fossil fuels

Global temperature rise is fastest in at least 11,000 years, study says

Iran nuclear talks: Will hints of sanctions relief yield progress? (+video)

Culture Cafe Johnny Depp to play Whitey Bulger in a new biopic (+video)

Did global warming cause superstorm Sandy? (+video)

Keystone XL pipeline: Nebraska officials get tough on TransCanada

Iran nuclear talks get nitty-gritty in Moscow

Culture Cafe 'Hannibal' the TV series casts its villain

Hopes fade for progress at Iran nuclear talks in Baghdad

Keep Calm Europe launches airstrikes on Somalia to uproot pirate base

Heartland Institute's digital billboards make bombastic comparisons (+video)

Iran nuclear talks: 'constructive' day yields plan for Round 2 in May

Documents reveal Koch-funded group's plot to undermine climate science

Volcanic eruptions emerge as lead cause for Little Ice Age

As sanctions bite, Iran threatens US aircraft carrier (Video)

Hacked 'Climategate' emails 'truly pathetic,' says climate scientist

Climate change will bring more monster winter storms

In Pictures CES 2011

Russia fires caused by global warming? Maybe not, say scientists.

Inception: movie review

Climate scientists exonerated in 'climategate' but public trust damaged

Global warming skepticism is fueled by public relations, author says

Will clash of science and politics undermine Copenhagen summit?

'Climategate': leaked emails push scientists toward transparency