Molly John

Written by Molly John

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

Places

Cities With The Worst Air Quality In North America

infographic showing the 10 tallest mountain ranges in the world

Landforms

The World's Tallest Mountain Ranges

A street in West Yellowstone, Montana. Editorial credit: Matthew Thomas Allen / Shutterstock.com.

Society

The Ethnic Composition Of Montana

Bronze statue of Lewis and Clark on the Lewis and Clark Trail in Sesside, Oregon. Editorial credit: Png Studio Photography / Shutterstock.com

World Facts

Which Places Were Explored By Lewis And Clark?

People crossing the Dajabón River between Haiti and the Dominican Republic. Editorial credit: Sandra Foyt / Shutterstock.com

World Facts

What Countries Border Haiti?

A sign indicating the boundary between Northern Ireland (UK) and Ireland. Editorial credit: Remizov / Shutterstock.com

World Facts

What Countries Border The United Kingdom?

Ancient Polynesian carvings at the Ki'i Pu'uhonua O Honaunau National Park in Hawaii.

Society

Religious Beliefs In Hawaii

The Old Royal Palace in Athens houses the Hellenic Parliament.

World Facts

Is Greece A Country?

People walk through the autumn leaves in Vermont.

World Facts

The Ethnic Composition Of The Population Of Vermont

Severn Bridge is the first road crossing connecting England and Wales.

World Facts

Which Is The World's Most Expensive Toll Road Per Mile?

VLFSs can be used as floating airports and landing pads.

World Facts

What Is A Very Large Floating Structure (VLFS)?

Twilight and dusk occur as the sun falls below the horizon.

Environment

What Is The Difference Between Dusk And Twilight?

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