How Eratosthenes calculated the Earth’s circumference more than 2k years ago?

In 240 BC, the Greek astronomer, geographer, mathematician, music theorist, and librarian Eratosthenes of Cyrene (c. 276 BC – c. 195/194 BC) calculated the circumference of the Earth without even leaving Egypt. Here’s how:

Top 10 driest places on Earth

The Earth is home to an incredible variety of landscapes, from lush tropical rainforests to snow-capped mountains. However, there are also places on our planet where rainfall is extremely scarce and the land is bone-dry. In this article, we will explore the top 10 driest places on Earth, from deserts to the harsh terrains of …

The average and maximum depths of the oceans

The Earth’s oceans are vast and largely unexplored, covering over 70% of the planet’s surface. Despite our limited knowledge of the depths below, scientists have been able to determine both the average and maximum depths of the oceans through a variety of methods. Understanding these depths is crucial for a range of scientific and practical …

Your Life On Earth [presented by BBC]

“Your life on Earth” is a nice interactive webpage presented by the BBC – The British Broadcasting Corporation: how you and the world have changed since you were born? You’re simply entering your birth date, gender, and height; selecting units (metric or imperial/US), and then watching how our planet (and you) has changed in your …

No! The Earth Would NOT Look Like This Without Water

The Earth would NOT look like this without water. Please stop sharing this nonsense. Water is an essential component of life on Earth. It covers over 70% of our planet’s surface and plays a vital role in sustaining both plant and animal life. Despite its importance, there has been a growing misconception that the Earth …

Vulcan Points [island within a lake that is situated on an island located in a lake on an island]

Can you imagine an island within a lake that is situated on an island located in a lake on an island? Confused? Well, it is really confusing, but this island does indeed exist: Vulcan Points is the world’s largest island within a lake (Crater Lake) that is situated on an island (Taal Volcano Island) located in …