Mars Melt Hints at Solar, Not Human, Cause for Warming, Scientist Says

Over the past decade or so Earth's climate has been warming up. Many people have believed that this global warming affect was caused by humans. Scientists now say that global warming is also happening on Mars, which suggests that our planet's recent climate changes are from natural causes. Researchers say that the carbon dioxide "ice caps" on Mars have been slowly shrinking over the last three Martian Summers. So the global warming affect may have more to do with solar cycles that with the pollution that humans have created.