Scientists announced this week that they have created the most advanced clock in the world.
The clock, described this week in the journal Nature, is so precise that it would neither lose nor gain one second in about 5 billion years of continuous operation. That's pretty good, considering that the Earth itself is only around 4.5 billion years old.
Boulder officials have taken a significant step toward bringing the electric grid under city management. City officials sent a notice of intent to current operator Xcel Energy announcing plans to acquire parts of the electric infrastructure. The letter kicks off discussions on cost for the city — but there are limits.