Earth Matters

NASA's 'Black Marble' shows Earth's nighttime glow

Birds respond to human noise by singing louder, shorter songs

Alligator refuses to leave South Carolina porch

Latest iceberg off Newfoundland coast leaves crowds awestruck

Giant shipworm the size of a baseball bat found alive for first time

Fiona takes the adult pool for a test drive

Do you know your national parks?

Cosmic web of 'dark matter bridges' link galaxies across the universe

See April the giraffe's calf takes its first steps

Startling before-and-after images of melting glaciers tell the story of climate change

What our fascination with April the giraffe's pregnancy says about us

Woodpecker catches a cab in Chicago

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