Science Concepts Explained

Marker ink separates into different colors on wet paper because most inks are blends of several dyes, and each dye travels a different distance as water moves through the paper.

A convection current forms when part of a fluid is heated, becomes less dense, and rises while cooler, denser fluid sinks to take its place. Hot water floats on cold

Liquid mercury is already denser than iron, at 13.53 g/cc. Freezing a liquid increases its density. So, does freezing it finally beat osmium, the densest element on Earth?

A cheetah can outrun almost anything on land, yet it weighs a small fraction of an elephant. If speed simply increased with size, the largest animals would be the fastest.