
Introduction: Every breath we take is part of an incredible biological process that keeps us alive — the gaseous exchange….

Introduction: Viruses are some of the most interesting yet feared tiny particles in biology. They are so small that we…

Introduction: Have you ever looked at the skyline of a big city and noticed a thick, hazy layer hanging in…

Introduction: Biology is the study of life and life, as we know it, comes in countless forms. From microscopic bacteria…

Introduction: Take a deep breath and think. The air that fills our lungs should be fresh, clean and life-giving, yet…

Introduction: When most people hear the word bacteria, they immediately think of infections or diseases. However, the truth is that…

Introduction: A Planet in Transition Earth’s climate has always changed from ice ages to warm periods but never at the…

Introduction: The Earth’s climate has always changed over time, but never as rapidly as it is today. Global warming—the long-term…

Introduction: Science and religion are often seen as two separate worlds — one driven by reason, the other by revelation….

Introduction: The Living Network That Sustains Us Every living thing on Earth from the tiniest microbe in the soil to…