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New Killer Sponges Found in the Deep Sea

The carnivorous invertebrates, discovered deep in the waters off California, use tiny hooks on their bodies to capture prey, a new study says.

World’s First Female “Penis” Found, in Cave-Dwelling Bugs

Four new species of cave insects in Brazil have sex-reversed genitalia, a “completely astonishing” discovery, scientists say.

Your Weird Animal Questions Answered: Love in the Animal Kingdom

With spring in the air, we answer your questions about animal romance, from elephant seals to stick insects.

Monarch Butterflies Shrink, Get Paler After Skipping a Meal

Brilliantly colored monarch butterflies literally are what they eat—and missing even one meal can be harmful, a new study says.

Ancient Daddy Longlegs Had Extra Set of Eyes

The 305-million-year-old fossil may reveal secrets about the evolution of spider eyes, new study says.

Mystery Solved: Why Flies Are So Hard to Swat

Flies on the wing react to threats like fighter jets, banking away in a fraction of the blink of an eye, a new study says.

Your Weird Animal Questions Answered: Is Your Dog Part Coyote?

Is your dog part coyote? Do St. Bernards really rescue people? Get the facts on man’s best friend in this week’s column.

New Species: Pink-and-Yellow Frog With Spikes

High in the mountains of Vietnam, scientists have found a “striking” new species of pink-and-yellow frog covered with sharp spikes, a new study says.

Why Do Zebras Have Stripes? New Study Offers Strong Evidence

The zebra’s stripes evolved to keep pesky insects at bay, according to the most thorough study to date on the subject.

How an Injured Snowy Owl Got New Feathers

A snowy owl hit by a bus in D.C. has had a rough few months, but the bird is getting a makeover—including some shiny new feathers.

Your Weird Animal Questions Answered: Is a Sloth a Good Pet?

Why do dogs chase certain vehicles? Do otters or sloths make good pets? This week we answer your questions about critters closest to home—pets.

“Strange” New Frog Found in Swimming Pool

A boy in eastern Colombia recently found more than just fun in his swimming pool: A new species of frog.

Dog Brains Link Pleasure With Owner’s Scent

An owner’s scent activates the parts of a dog’s brain associated with pleasure, a new brain-imaging study says.

Your Weird Animal Questions Answered: Biggest Great White Shark

In our weekly column, we tell you how spiders walk on water, how many teeth alligators have, and more.

19 New Species of Speedy Praying Mantises Found

Scientists have found 19 new species of mantises that roam Central and South America—and named one of them after Al Gore, a new study says.