LOVE BIRDS: Mute swans—native to Europe and Asia—show affection by ruffling their feathers and pointing their heads together, forming a heart shape with their necks.
Photograph by Chris Grady, Alamy
PRICKLY BUT CUTE: Some cactus plants grow leaves shaped like hearts. They might look sweet, but don’t forget: They’re covered in sharp spines!
Photograph by Corbis, AGE Fotostock
WORM AND FUZZY: Feather duster worms, like this one in the Solomon Islands (a country near New Zealand), are flexible enough to twist into lots of different positions.
Photograph by Chris Newbert, Minden Pictures
SWEET RETREAT: A heart-shaped reef is just one of thousands of coral formations that makes up Australia’s Great Barrier Reef.
Photograph by Jurgen Freund, NPL, Minden Pictures
FROM THE HEART: Trees release oxygen for animals to breathe. If that isn’t enough of a reason to love trees, here’s another: This tree trunk formed a heart-shaped opening for another plant to grow in.
Photograph by F Hecker, AGE Fotostock
GOING THE DISTANCE: Leaf-cutter ants in Central and South America can carry leafy bits—like this one with a heart-shaped hole—that are 20 to 50 times their own body weight.
Photograph by Bence Mate, NPL, Minden Pictures
PERFECT PAIR: Two European bee-eaters get cozy in Seville, Spain. Bee-eater mates usually stay together for life.
Photograph by Jose B. Ruiz, Nature Picture Library
SET IN STONE: Wind and water wear away at big rocks and often transform them into small round pebbles. This one in France wound up shaped like a heart.
Photograph by Jean-Louis Le Moigne, Biosphoto, Minden Pictures
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