Too often, signs of trouble are ignored until a problem becomes a crisis. Here are some clear warning signs residents should watch for. If you see something, say something – it could save lives.

At one time, perhaps as many as 2 million gray wolves roamed the North American continent. But now those numbers are down to a few thousand.

Impress your niece or nephew with these T rex facts.

Though progressive politics at the turn of the 20th century called for the protection of America’s national parks, it did so for the enjoyment of white people.

New laboratory experiments add analytical rigour to the search for ancient biomolecules

Municipal waste incinerators' legacy of contamination could live on in urban soils, finds a study on lead in city parks.

US cities are starting to reform laws that required developers to provide minimum amounts of parking. But there’s more they can do to loosen the auto’s grip on downtowns.

A newborn bison calf in Yellowstone National Park had to be euthanized after a visitor handled it in May 2023 – a recent example of how trying to help wild animals often harms them.

A new report lays out steps communities can take to help their residents survive heat waves as the risk of dangerous temperatures rises.