This video explores the question of why the sky is dark, examining key concepts such as the infinite nature of the Universe and Olber’s Paradox. Chapters: 00:00 Introduction 00:53 Why is the sky dark?

Students should focus on problem-driven learning and develop the ability to deal with ambiguity and complexity on the ground, experts suggested at a webinar on ‘Beyond the Classroom: The Real MBA ...

The cover captures a hartebeest (Alcelaphus buselaphus) in South Africa. Although maintaining biodiversity is core to sustainable development, policymakers frequently lack context-specific information ...

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 ...

Troy Segal is an editor and writer. She has 20+ years of experience covering personal finance, wealth management, and business news. David Kindness is a Certified Public Accountant (CPA) and an expert ...

Dec. 31, 2025 Microplastics in rivers, lakes, and oceans aren’t just drifting debris—they’re constantly leaking invisible clouds of chemicals into the water. New research shows that sunlight drives ...

Poet Franny Choi on the value of imagining alternate realities What’s the value of asking questions to which we don’t know the answer? Poet Franny Choi’s “Introduction to Quantum Theory” does just ...

January 5, 2026 • Venezuela's Nicolás Maduro and his wife, Cilia Flores have pleaded not guilty to all charges during their first court appearance in their federal narco-terrorism case.