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Doug Whitney inherited the same gene mutation that gave Alzheimer’s disease to generations of relatives by the average age of 50. Yet at 73, his mind is sharp. To scientists he offers a chance to learn how the body may resist Alzheimer’s.

As Latinos age in the Rio Grande Valley, the border region is experiencing a surge of dementia-related disease – pushing scientists to find out why.

From South Dakota and Oklahoma to Alaska and Alberta, Indigenous groups in the U.S. and Canada are leading efforts to restore bison across North America.

The rush to build wind farms to combat climate change is colliding with preservation of one of the U.S. West’s most spectacular predators — the golden eagle — as the species teeters on the edge of decline.

Long-term studies in Los Angeles and Mumbai, India, have examined how big cats prowl through their urban jungles, and how people can best live alongside them — lessons that may be applicable to more places in coming decades.

The nonprofit Dian Fossey Gorilla Fund announced that more land in eastern Democratic Republic of Congo where Grauer’s gorillas live will fall under a community-protection initiative.

As few as three major criminal groups are responsible for smuggling the vast majority of elephant ivory tusks out of Africa, according to a new study.

Scientists are using human stem cells to create a structure that mimics a pre-embryo and can serve as a research alternative to a real one.

Earth desperately needs people to stop burning coal, the biggest single source of greenhouse gases, to avoid the most catastrophic impacts of climate change. But it is the world’s biggest source of fuel for electric power and so many depend on it for their very lives.

State and federal agencies that long banned “cultural burns” in the U.S.

The US government has pushed more aggressive thinning of stands to reduce vegetation that fuels wildfires.

This animation shows two examples of how the cell uses energy from ATP. It is the sixth of six animations about cellular respiration. These animations bring to life the molecular engines inside mitochondria that generate ATP, the main source of chemically stored energy used throughout the body.