Cement is the most commonly used construction material in the world, used to create everything from skyscrapers to sidewalks.

Healthy corals are colorful and full of life. And under normal conditions, corals and algae depend on one another. The corals offer the algae protection and the photosynthesizing algae provide the ...

Exploring slate mines in north Wales, UK, my son and I often find structures that resemble a mussel or similar bivalve on rusting iron metalwork (pictured). What’s going on? This looks very much like ...