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 ...

Scientific method is a body of techniques for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge. It is based on gathering observable, empirical and ...

Alexandra Twin has 15+ years of experience as an editor and writer, covering financial news for public and private companies. Thomas J. Brock is a CFA and CPA with more than 20 years of experience in ...

Jennifer Simonson is a business journalist with a decade of experience covering entrepreneurship and small business. Drawing on her background as a founder of multiple startups, she writes for Forbes ...

Restoration is one way scientists are trying to save and enhance existing coral reefs. One way of doing this is to remove a healthy coral, or part of a coral, from the ocean to protect it, and grow ...

Gordon Scott has been an active investor and technical analyst for 20+ years. He is a Chartered Market Technician (CMT). Suzanne is a content marketer, writer, and fact-checker. She holds a Bachelor ...

Survey Basics Online Surveys Telephone Surveys Voter Files International Survey Methods We often hear a candidate is leading, trailing, or the race is tied. This is based on “horse race” polling, ...

LoL-align is a probabilistic, distance-based protein structure alignment algorithm that iteratively optimizes a local log-odds score, achieving higher sensitivity for remote homologs and better ...

U.S. EPA. 2014. "Method 8270E (SW-846): Semivolatile Organic Compounds by Gas Chromatography/ Mass Spectrometry (GC/MS)," Washington, DC. EPA’s Selected Analytical Methods for Environmental ...

On September 14, 2026, EPA published a Request for Information seeking public input on updates to test methods and waste sampling guidance under the Resource Conservation and Recovery Act. Comment ...