Earth (planet)
Negative leap second may be needed to adjust for Earth spinning slower
Science
Dr. Sarah Adams
Leap seconds are added because if Earth is rotating slower over millions of years then a Coordinated Universal Time (UTC) minute would ...
How to safely record the total solar eclipse with your cellphone
Science
Dr. Sarah Adams
Here is what to know about recording the total solar eclipse in the U.S. safely with your cellphone and capturing the best ...
