When the Western US burns, the East also gets sick

While most of the largest U.S. wildfires occur in the Western U.S., almost three-quarters of the smoke-related deaths and visits to the emergency room for asthma occur east of the Rocky Mountains.

EXPLAINER: Why Haiti is prone to devastating earthquakes

Earthquakes have been wreaking havoc in Haiti since at least the 18th century, when the city of Port-au-Prince was destroyed twice in 19 years. Saturday's powerful quake killed hundreds and injured thousands more. Eleven ...

Is your home at risk of experiencing a natural disaster?

Reports from the scenes of natural disasters—raging wildfires, unrelenting floods, violent ground shaking, and devastating tornadoes and hurricanes—fill our news feeds every day. These hazards cause deep disruptions to ...

How landscapes of fear affect the songbirds in our backyards

A team of researchers headquartered at the University of Massachusetts Amherst has recently discovered that fear plays an important, unrecognized role in the underdevelopment, and increased vulnerability, of backyard songbirds.

Scientists risk overestimating numbers of wild bonobos

There might be fewer bonobos left in the wild than we thought. For the last 40 years, scientists have estimated the abundance of endangered bonobos by counting the numbers of sleeping nests left by the apes in forests of ...

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Population density

Population density (in agriculture standing stock and standing crop) is a measurement of population per unit area or unit volume. It is frequently applied to living organisms, and particularly to humans. It is a key term used in geography.

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