Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The Hadean Eon, which stretched from 4.6 to 4.0 billion years ago, represents one of the least understood periods in Earth's past.

From Science Daily • Dec. 4, 2025

For many years, researchers believed that Earth remained in a "stagnant lid" state until at least the end of the Hadean.

From Science Daily • Dec. 4, 2025

A handful of these zircons, clustering at an age of 4 billion years old, had very light oxygen isotope records compared with other Hadean zircons.

From Science Magazine • Apr. 30, 2024

The oldest is the Hadean, which marks the period in which our planet first formed some 4.5 billion years ago, around the same time our moon formed as well.

From Salon • Dec. 13, 2023

"The revelation of the mystery" means, then, the visible enactment and exhibition, through the resurrection of Christ, of God's free forgiveness of men, redeeming them from the Hadean gloom to the heavenly glory.

From The Destiny of the Soul A Critical History of the Doctrine of a Future Life by Alger, William Rounseville