Greenhouse gasses may not be the sole culprit behind climate change. According to a new study, ocean currents also play a huge part in regulating our climate. Phys.org reports that Rutgers University research shows major cooling of the Earth and ice buildup that happened 2.7 million years ago took place alongside a shift in the circulation of ocean currents, which pull in heat and CO2 from the Atlantic and move them through the deep ocean in a north to south direction before releasing the water into the Pacific…”We argue that it was the establishment of modern deep ocean circulation – the ocean conveyor – about 2.7 million years ago, and not a major change in carbon dioxide concentration in the atmosphere that triggered an expansion of the ice sheets in the northern hemisphere,” says Stella Woodard, lead author of the study and post-doctoral researcher at Rutgers Department of Marine and Coastal Sciences.