National security, unlocked. Each Thursday, host Mary Louise Kelly and a team of NPR correspondents discuss the biggest national security news of the week. With decades of reporting from battlefields ...

Although present in very small amounts, selenium (Se)-based compounds play important roles in protecting the body from oxidative stress, regulating thyroid hormones, strengthening the immune system, ...

Man Put to Death for Killing a Grocery Store Owner in Florida's Second Execution This Year STARKE, Fla. (AP) — A man convicted of killing a 70-year-old grocery store owner was put to death Tuesday in ...

Computational models are mathematical models used to numerically study the behaviour of complex systems by means of a computer simulation. A computational model can be used to make predictions of the ...

This story is a collaboration with Biography.com. Government reports rarely make for stimulating reading. That’s because most government reports aren’t about throwing people off a cliff or clubbing ...

Waveguide-enhanced Raman spectroscopy utilizes electromagnetic enhancements at waveguide surfaces to improve Raman signal intensity. This Primer discusses laser selection, waveguide design, light ...