National Geographic

Stefan Sirucek

Stefan Sirucek is a writer and journalist who reports from both sides of the Atlantic. He's written for the Huffington Post and Wall Street Journal. Follow him on Twitter at @sirstefan.

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.

Why Is the Cold U.S. Winter Killing Off Stinkbugs?

The brutal U.S. winter is killing off the invasive Asian stinkbug, a new experiment shows.

Hummingbirds May Change Their Tunes to Seduce Mates

Male hummingbirds in Costa Rice can change their tunes to attract mates, new research shows.

Meet the Animals Behind the Mascots of the 2014 Winter Olympics

Organizers of the 2014 Winter Olympics in Sochi, Russia, have picked the leopard, the hare, and the polar to represent the Games as mascots.

9 Things You Didn’t Know About Groundhogs

In honor of Groundhog Day, here are nine facts about groundhogs you probably didn’t know.

Striking Picture: Bats Hunt Frogs by Detecting Water Ripples

Male rain forest frogs sing love songs that create water ripples—and attract bat predators, a new study says.

“World First”: Watch Polar Bear Cubs Open Eyes

Munich’s Hellabrunn Zoo catches twin cubs opening their eyes—the first such video ever recorded.

Did Ancient Peoples Bless Their Houses With Eggs?

Two-thousand-year-old eggs found recently at an archaeological site in Turkey were likely meant to bless the house as part of a purification ritual, scientists say.

Video: Why Do Prairie Dogs Do “The Wave”?

The burrowing rodents mimic each others’ jumps and yips to ensure everyone in the colony is alert and working together, a new study says.

How Cats and People Grew to Love Each Other

A new study marks possibly the earliest known evidence of a beneficial relationship between humans and cats.

Alien Cockroach Species Invading the U.S.

New York City, home to eight million people and untold numbers of cockroaches, just got a few more of the latter. A newly seen species, Periplaneta japonica, has just been discovered in New York’s elevated High Line park. As its name implies, the cockroach is native to Japan, and this is the first time it’s been…

Male Lizards Less Attracted to “Bearded Ladies”

When it comes to choosing a mate, male lizards tend to go for more “feminine” females without blue necks, a new study says.

8 of Nature’s Thirstiest Bloodsuckers

From insects to mammals to deepwater lurkers to even birds—in the spirit of Halloween, here’s our list of animals out for blood.

Blood Found in Mosquito Fossil: “One of a Kind”

Scientists have discovered blood in a mosquito fossil, a new study says—but don’t get your hopes up for a pet velociraptor.

Enemies With Benefits: How Parasitic Ants Protect Their Hosts

What might be the best-titled research paper of the year comes to us courtesy of researchers at the University of Copenhagen, an investigation entitled “Chemically armed mercenary ants protect fungus-farming societies.” Have you got your popcorn ready? It’s a tale of three species. We begin with a fungus-growing ant called Sericomyrmex amabilis found in the tropical…