Résultats pour "Underground" dans Sciences et technologies

Whether it's being lost in a cave or caught in a collapsed mine, being trapped underground can be terrifying. You may be cold, wet, hungry, and stuck in absolute darkness. Even worse is not knowing if anyone will ever find you. Find out how people survived their ordeal in these true stories of those who were trapped underground in this book from the Fighting to Survive series.

How can important information and valuable items be kept safe as years pass? Many of these items are stored in underground vaults, including recordings and photos from U.S. history, important documents, and more. Locks, guards, secret passwords, and technology all play a part in the protection of the items.

The Underground Railroad was used by people escaping enslavement in the South. This system of passages and safe houses helped people reach freedom in the Northern United States or Canada. Did you know science played a role in the Underground Railroad?