A crystal is a solid with a periodic atomic structure and a deviation from the periodicity of the crystal lattice is called a defect. Crystalline defects include point defects (e.g. colour centres) ...

"What started as something asymptomatic for the majority of my life turned into a lingering cough, which turned to chest pains, bouts of coughing up blood, then at times, struggling to breathe," she ...

Topologically protected vortex knots are shown to undergo fusion and fission, with electric pulses acting as a switch between the two processes. This might enable applications in electro-optics and ...

Caroline Banton has 6+ years of experience as a writer of business and finance articles. She also writes biographies for Story Terrace. David Kindness is a Certified Public Accountant (CPA) and an ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Thomas J Catalano is a CFP and Registered ...