Chemistry

The Mpemba Effect: Can Hot Water Freeze Faster?

Under some conditions, hot water seems to freeze faster than cold. Explore the Mpemba effect and a genuine, unresolved puzzle in physics.

The Science of Rust: The Slow Burning of Metal

Rust is a slow chemical reaction that consumes iron. Explore the science of rust, why it forms, and why it is so destructive.

Why Metal Feels Colder Than Wood

A metal spoon and a wooden one in the same room feel different temperatures— but they are not. Explore thermal conductivity and the science of feeling cold.

The Science of Static Electricity

The shock from a doorknob and the cling of laundry share one cause. Explore the science of static electricity and the movement of charge.

Why Ice Floats: The Strange Density of Water

Almost every substance is denser as a solid than as a liquid—but not water. Explore why ice floats and why this oddity matters for life.

The Biology of Ambergris: Sperm Whale Gut Chemistry

Why is whale vomit worth $10,000 a pound? Discover the biology of Ambergris and the chemical transformation of squid beaks in the Sperm Whale's gut.

The Biology of the Bombardier Beetle: Chemical Injection

Meet the animal with a chemical reactor in its abdomen. Discover the Bombardier Beetle and the extreme physics of Pulse-Jet defense.

The Biology of Musk: Macrocyclic Ketones

Why is Musk the most famous scent in history? Discover the Musk Deer and the biological chemistry of the 'Muscone' molecule.

The Biology of Papain: The Meat Tenderizer

Meet the Papaya's secret weapon. Discover Papain and the extreme biology of Latex-based protein digestion.

The Science of Beaver Castoreum: Scent Marking

Why does a beaver smell like vanilla? Discover Castoreum and the biological chemistry of plant-derived scent marking in the Beaver.

The Science of Bromelain: Protein Digestion

Why does pineapple make your mouth tingle? Discover Bromelain and the aggressive biology of Proteolytic Enzymes.

The Science of Luciferase: Cold Light Efficiency

How does a bug make light without heat? Discover Luciferase and the extreme 98% efficiency of biological luminescence.