Earth’s orbit subtly changes over thousands of years, in complex cycles that affect the timing and delivery of sunlight to various More
Breaking the bubble!
North Korea’s nukes
Underground nuclear tests have been the biggest roadblock to a comprehensive test ban. How are these explosions detected, and how More
Year of astronomy: More reasons to love stars!
400 years ago, Galileo discovered the moons of Jupiter. We discover water from 11 billion years ago, volcanoes at Titan, and more! More
New concern as ocean grows more acidic
Each hour, the ocean dissolves 1 million tons of carbon dioxide from burning fossil fuel. As the water grows more acidic, sound More
Laser: The invention that just won’t quit!
Lasers read and write CDs and DVDs, form the heart of fiber-optics, and are being used in climate prediction, and other areas. More
The sounds of sax
New study shows that controlling throat shape helps pro players hit the high notes that elude amateurs. More
Big ideas from the smallest world
New snowflake generator reveals nature’s design principles; anti-reflective coating is nearly perfect. Dive into the nitty gritty! More
Ultimate Storm: What are hurricanes?
How do hurricanes form? How do we predict their paths? How can we improve predictions? More
Universe: Measured by New Yardstick
Feeling cramped? New measurement says the universe is bigger than you thought. Meet the astronomers’ new yardstick. More
NASA to Earth Science: Take the Back Seat!
To understand and protect the home planet: it’s no longer a key NASA mission. What will we lose as NASA turns its eyes to the moon? More
Star-Burst Fills Empty Hole
Where did all the dust come from? New study shows a star explosion making mucho dust. More
Science Meets Sports
The Why Files looks at kinesiology, sports medicine, psychology and some ancient Olympic history, brought to life. More
Time to Reconsider the Leap Second
The solar clock doesn’t quite line up with the atomic clock. We use leap seconds to make them match. Should we dump the leap second? More