Live Science

What's Hot This Week Sex in Space & Other Interstellar Travel Challenges Revealed by Clara Moskowitz, SPACE.com Senior Writer Building a spaceship to visit another star is hard enough, but keeping the humans onboard alive for the ride may be even harder, space experts said Friday in a symposium dedicated to interstellar travel. Parents Distrust, Delay Vaccines, Survey Finds by Lauren Cox, MyHealthNewsDaily Contributor Parents are increasingly skipping or delaying vaccines for their young children, despite doctors' concerns that doing so will leave their children and community at risk for preventable diseases. Sponsored by: Explosive Studies of Universe's Expansion Win Nobel Prize in Physics Aging and Ill Animals Increasingly Bring Tough Choices to Zoos Like Humans, Abused Baby Birds Grow Into Bullies Texting More Popular Than Talking? (Infographic) Bug Bite Leads to Photography Prize for Scientist