variegated toad

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Panamanian golden toad (Atelopus zeteki)

harlequin frog (Atelopus)

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Dr. Martin Luther King Jr. addresses marchers during his "I Have a Dream" speech at the Lincoln Memorial in Washington. August 28th 1963

Was Martin Luther King, Jr., a Republican or a Democrat?

Hemp (Cannabis sativa).

9 Mind-Altering Plants

Lateral view of an adult bedbug, Cimex lectularius, as it was in the process of ingesting a blood meal from the arm of a voluntary human host. Photo dated 2006.

8 Animals That Suck (Blood)

Martin Luther King, Jr.

Why We Celebrate MLK Day

Andrew Jackson delivering a speech while on his way to Washington, D.C., for his inauguration in 1829. From Harper's Weekly, 1881.

5 Remarkably Close U.S. Presidential Elections

Malayan Leaf Frog - Megophrys nasuta

9 Animals That Look Like Leaves

American bison (Bison bison) also known as buffalo or plains buffalo on the prairie, western U.S.

What’s the Difference Between Bison and Buffalo?

variegated toad: Media

amphibian

Images

Panamanian golden toad (Atelopus zeteki)

Panamanian golden toad (Atelopus zeteki)

The Panamanian golden toad (Atelopus zeteki) is considered to be one of...

© Danny Ye/Shutterstock.com

harlequin frog (Atelopus)

harlequin frog (Atelopus)

Strikingly colored harlequin frog (Atelopus species) in Ecuador.

Pete Oxford/Nature Picture Library