cannabis

Table of Contents

Introduction References & Edit History Quick Facts & Related Topics

Images & Videos

Using saliva to test for marijuana use

Read Next

Plant seedlings emerging from rich fertile soil

Do Plants Feel Pain?

Flower bingo

Britannica’s Flower Bingo

Close-up of marijuana plant growing outdoors

Why Is Marijuana Illegal in the U.S.?

Woman Smoking Marijuana In Plantation

What Are the Biological Effects of Marijuana Use?

Close-up of marijuana plant growing outdoors

What Is the Difference Between Hemp and Marijuana?

Discover

Shah Jahan. Taj Mahal. Mughal architecture. Emperor Shah Jahan fifth Mughal Emperor (reigned 1628-1658) India, Himachal Pradesh, Basohli or Jammu and Kashmir, Mankot, circa 1690 Drawings; Opaque watercolor, gold, and ink on paper (see notes)

6 Important Mughal Emperors

Illustration for Demystified "How Dangerous is Quicksand"

How Deadly Is Quicksand?

Two chicks near an egg with a white background (poultry, chick, chickens, birds).

What Do Eggs Have to Do with Easter?

July, 2006, Launch of Space Shuttle Discovery STS-121. See attached for full caption information.

Will Light-Speed Space Travel Ever Be Possible?

Titanic infographic. The 30th anniversary of its discovery is September 1, 2015. SPOTLIGHT VERSION.

Timeline of the Titanic’s Final Hours

Cheetah (Acinonyx jubatus) standing on rock, side view, Masai Mara National Reserve, Kenya

The Fastest Animals on Earth

Marriage. A couple getting married during a church wedding ceremony. (religion, ceremony, bride, groom)

The Seven Sacraments of the Roman Catholic church

cannabis: Media

plant

Videos

Using saliva to test for marijuana use

Using saliva to test for marijuana use

Saliva testing for cannabis could someday help identify impaired drivers.

Video: © American Chemical Society (A Britannica Publishing Partner)

Images

hemp

hemp

Hemp (Cannabis sativa).

U.S. Fish and Wildlife Service

VIEW MORE in these related Britannica articles: