Biological production of this greenhouse gas, once thought to be the reserve of anaerobic microbes, occurs in these widespread, photosynthesizing cyanobacteria.

The animals have a smaller body mass, shorter legs, and longer wings than they did four decades ago.

From 1969 to 1988, 25,000 infants were born early each year as a result of hot weather, and with global warming pushing temperatures higher, more babies will be at risk for early birth.

Carbon dioxide and temperature need to increase in a constant ratio for plants to keep up with climate change.

Warming temperatures threaten reindeer herding and the preservation of cultural artifacts in Mongolia.

Insulating tundra soil with snow increased the abundance of microbial species involved in carbon dioxide and methane release.

The majority of lakes studied experienced increased bloom intensity over the past few decades.

Signatories of the declaration say the need for governments to act on human-driven climate change is too urgent to stay silent.

Environmental activists of all ages took to the streets in cities across the globe.