Molly John

Written by Molly John

A geometric tortoise.

Environment

The World's Most Threatened Reptiles

The American accent was influenced by immigrants and British colonizers.

World Facts

Where Did the American Accent Come From?

A Tonkin Snub-Nosed Monkey.

Environment

The World's Most Threatened Primates

In the UK and other Commonwealth countries, sleet is referred to as snow that partly melts as it falls.

World Facts

What is Sleet?

Monterrey, Mexico has the worst air quality in North America.

Environment

Cities With The Worst Air Quality In North America

An Edward's Pheasant.

Environment

The World's Most Threatened Birds

Cloudbursts are often accompanied by hail or thunderstorms.

World Facts

What Is a Cloudburst?

The size and shape of a river changes as flows downstream.

Environment

Why Does the Width of a River Increase As it Flows Downstream?

The destruction of natural habitats such as marshland has contributed to the decline in amphibian populations.

Environment

The World's Most Threatened Amphibians

The Russian Armed Forces has an attack aircraft fleet of 1,438 helicopters.

World Facts

Countries By Number of Attack Helicopters

Busy street in Lisbon, Portugal. Editorial credit: Radu Bercan / Shutterstock.com

World Facts

The Largest Ethnic Groups in Portugal

Martin Van Buren served as the eighth US President from March 4, 1837 to March 4, 1841.

Politics

Who Was the First President to Be Born an American Citizen?

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