In this Jan. 13, 2021, file photo a wind turbine is silhouetted against the rising sun Wednesday, Jan. 13, 2021, near Spearville, Kan.

With demand for COVID-19 vaccines outpacing the world’s supplies, a frustrated public and policymakers want to know: How can we get more? A lot more. Right away.

The world’s vital insect kingdom is undergoing “death by a thousand cuts,” the world’s top bug experts said.

America’s rivers are changing color — and people are behind many of the shifts, a new study said.

The COVID-19 pandemic has helped revive the autopsy.

This animation shows how the proton gradient across the mitochondrial membrane powers the ATP synthase enzyme to make ATP. It is the third of three animations about cellular respiration.

This animation shows how the enzyme complexes of the electron transport chain harvest energy from cofactor molecules to pump protons across the mitochondrial membrane and establish a chemical gradient. It is the second of three animations about cellular respiration.

This animation shows the reactions of the citric acid cycle, which splits off carbon atoms and generates energy-rich reduced forms of cofactor molecules. It is the first of three animations about cellular respiration.

This three-part animation series explores the biology of the virus SARS-CoV-2, which has caused a global pandemic of the disease COVID-19.

Every year, as many as 400 million people are infected with life-threatening diseases by the Aedes aegypti mosquito. It wasn’t always so dangerous.

Desperate to solve the deadly conundrum of COVID-19, the world is clamoring for fast answers and solutions from a research system not built for haste.

Across the U.S. and in Europe, researchers and health officials say they can track the course of a community outbreak of the new coronavirus by studying the waste flushed from its bathrooms. And that can provide a valuable addition to public health tools, they say.