How to Measure the Earth’s Radius With Legos

Make sure your angles are in units of radians (not degrees), where 2π radians = 360 degrees. But after that you will get the ...
The Golf Sensei on MSN

Fix Your Driver Swing Instantly: Simple Drill to Improve Angle of Attack | Golf Tips & Foam Roller Drill

Learn how to improve your angle of attack with a driver using a simple and effective golf drill demonstrated by a ...
The Golf Sensei on MSN

Perfect Your Backswing: Essential Drill to Maintain Spine Angle & Stop Head Sway | Golf Instructor Tip

In this comprehensive golf lesson, a professional golf instructor demonstrates a simple yet highly effective golf backswing drill you can practice at home or in a simulator. This golf posture drill ...
IFLScience

How Eratos­thenes Measured The Earth's Circumference With A Stick In 240 BCE, At An Astonishing 38,624 Kilometers

Though the exact length of a "stadia" is unknown, his measurement is thought to be accurate to within one percent of the ...