He has a lot of hair, so he seems warm even in winter.

The Hadean eon is considered the first era of Earth, lasting from about 4.6 billion years ago to 4 billion years ago.

He is a person of strong vanity who reads self-improvement books.

The concept of chemical equivalent is essential for understanding chemical reactions.

Let's use a radiation dosimeter to measure the radiation levels in this area.

The space complexity of this algorithm is O(n).

The time complexity of this algorithm is O(n).

Stoichiometry is a method for calculating the amount of substances in a chemical reaction.

If cardiac output decreases, blood flow throughout the body worsens.

Lime sulphur is often used to prevent pests and diseases in fruit trees.