Climate
- 			 Climate ClimateKangaroo gut microbes make eco-friendly fartsUnderstanding kangaroos’ low-methane flatulence could help researchers lower greenhouse gas emissions from livestock. By Beth Mole
- 			 Climate ClimateClimate change may spread Lyme diseaseThe territory of the ticks that transmit Lyme disease is growing as the climate warms. By Beth Mole
- 			 Earth EarthHow the Chicxulub impact made acid rainUsing lasers to accelerate materials to asteroid-like impact velocities, scientists have shown how the Chicxulub asteroid impact, which happened roughly 65 million years ago, could have created a mass extinction in the oceans. 
- 			 Climate ClimateWarm, wet weather may have helped Genghis Khan ruleMild, wet weather — not drought — may have helped Genghis Khan expand the Mongolian empire to the largest in human history. 
- 			 Climate ClimateCloudy forecastOver decades climatologists have grown more confident in their projections of the future impact of greenhouse gas emissions. But whether shifts in cloudiness will amplify global warming continues to vex researchers. 
- 			 Climate ClimateExtreme heat on the riseRecent years saw an increase in peak high temperatures on land despite Earth’s stalled averages. By Beth Mole
- 			 Climate ClimateSharks could serve as ocean watchdogsTagged with sensors, toothy fish gather weather and climate data in remote Pacific waters. By Beth Mole
- 			 Ecosystems EcosystemsArctic melting may help parasites infect new hostsGrey seals and beluga whales encounter killer microbes as ranges change. 
- 			 Climate ClimateBiggest climate warmersThe United States, China, Russia, Brazil, India, Germany and the United Kingdom are responsible for more than 60 percent of the 0.74 degree Celsius rise in global average temperature observed from 1906 to 2005. 
- 			 Climate ClimateStrong winds may have waylaid global warmingGusts over the Pacific Ocean may have stashed heat underwater since 2001. By Beth Mole
- 			 Climate ClimateWeather patterns over Southern Hemisphere have a regular pulseVariations in energy and rainfall over the Southern Hemisphere follow a pattern that repeats every 20 to 30 days. 
- 			 Ecosystems EcosystemsAmazon doesn’t actually go green in dry seasonsAn optical illusion in satellite data made forests appear to grow faster. By Meghan Rosen