Livescience When Do Children Develop Their Gender Identity? 2017-12-17T08:45:00.000000000-05:00 Gender is more of a flexible state than most people think. And as children, we start out thinking more flexibly about gender than we do as adults. Honanki Ruins: Photos Reveal Sprawling, Ancient Pueblos 2017-12-17T08:37:00.000000000-05:00 Honanki is one of the largest prehistoric pueblos in the Verde River Valley of Central Arizona. These Quantum Droplets Are the Most Dilute Liquids in the Known Universe 2017-12-17T08:04:00.000000000-05:00 A new form of liquid droplet, formed out of potassium "super-atoms," demonstrates strange and powerful quantum effects. The Most Interesting Science News Articles of the Week 2017-12-16T11:30:00.000000000-05:00 Here are the most interesting, amazing and unusual things that happened in the world of science this week. A recap of Live Science's best. Ancient Wari Queen Brought to Life with Stunning Recreation of Head 2017-12-16T11:26:00.000000000-05:00 At first glance, the wrinkled face of a dark haired-woman wearing round, gold earrings looks incredibly real. But it's not — it's a reconstruction crafted from modeling clay, based on the skull of a Wari queen who lived 1,200 years ago in what is now Peru California's Still Growing Thomas Fire Spews Brown Smoke in NASA Image 2017-12-16T11:20:00.000000000-05:00 A NASA satellite captured an image showing a thick curtain of brown smoke billowing from the Thomas Fire in Southern California yesterday (Dec. 14). Amazing Images: The Best Science Photos of the Week 2017-12-16T10:59:00.000000000-05:00 Here are the stories behind the most amazing images in the world of science this week. A recap of the coolest photos featured on Live Science. This Week's Strangest Science News 2017-12-15T12:25:00.000000000-05:00 Ready to get weird? Here are some of the strangest stories on Live Science this week. Am I Pregnant? | Taking a Home Pregnancy Test 2017-12-15T10:43:00.000000000-05:00 When you think you may be pregnant, it's time to check with a pregnancy test. It's important to understand how they work, how to read the results and which one is the most accurate. Photos: Children's Graves Discovered in Ancient Egypt 2017-12-15T07:04:00.000000000-05:00 Four intact burials of children have been discovered at Gebel el Silsila in Upper Egypt.