HuffPost Science: Earth's Timekeeper; Mars Rover; Risky Flyby

Thursday, May 24, 2012 Earth's Built-In Timekeeper The Earth is 4.54 billion years old; 3.8 billion years ago, the very first life form came into existence; 225 million years ago, dinosaurs came on the scene; and man took his first steps in Africa 200,000 years ago. How do we know this to be true? Click the link above to learn more. WOW: Mars Rover Sees Own Shadow In Dramatic Photo SpaceX Craft Attempts Risky Space Station Flyby Weird Sensory Organ Found In Whales Stunning Time-Lapse Of Meteor Shower From ISS TONIGHT: How To See Moon's 'Dark Side' BLOG POSTS David Kaiser: Elegant Wiggles: How the Universe Got Its Lumps Back in January the Edge posted almost 200 short essays in response to the question, "What is your favorite deep, elegant, or beautiful explanation?" Right away I knew what my favorite candidate would be: the prevailing explanation for why the universe is lumpy. Matthew Hutson: Do We See People in Persistent Vegetative States As More Dead Than Dead People? What do we think of people in persistent vegetative states, who can breathe but can't think? Mentally, they are dead, but since we're very aware of the body still lying there, we can't as easily imagine them as active characters in our lives. Anna Leahy: SpaceX: Future or Failure? Spaceflight is hard. Really hard. And that's one reason that we bother going to space at all. Garth Sundem: Salk Study: Eating for Eight Hours Reduces Obesity and Diabetes Risk Let's get this out of the way: No one's recommending you sit down and eat for eight hours. But a study shows that if you condense the total time you eat each day to only eight hours, you can prevent weight gain and reduce diabetes risk. J. Kelly Beatty: The Annular Eclipse: Seen Sideways Too many stories showed pictures of total solar eclipses instead of annulars. Confusion abounded as what you'd see from within the path versus elsewhere. At least they all emphasized the danger of looking directly at the Sun.

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