When Britain’s King Charles III is crowned in London on May 6, he’ll sit on an ancient chair housing a 335-pound boulder cloaked in mystery. Used for British coronations since the late 14th century, ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

A central pattern generator (CPG) is a neuronal network in which interconnected excitatory and inhibitory neurons produce an oscillating, rhythmic output in the absence of sensory feedback. CPGs play ...

This is a follow-up to a story that appears in the June 2018 issue of National Geographic magazine. On a fall morning in 1937, an Emory University geologist was walking down a hallway in the alumni ...

James Chen, CMT is an expert trader, investment adviser, and global market strategist. Somer G. Anderson is CPA, doctor of accounting, and an accounting and finance professor who has been working in ...

Here you will find videos and activities about the Stone Age. Try them out, and then test your knowledge with a short quiz before exploring the rest of the collection. Narrator: Excuse me. Yes, you.

Abstract: Pulse width modulation (PWM)-based voltage source inverters (VSIs) often generate lots of discrete PWM harmonic peaks, leading to issues like electromagnetic vibration and noise in motor ...