Add Yahoo as a preferred source to see more of our stories on Google. This NASA/ESA Hubble Space Telescope image features the spiral galaxy Messier 77, also known as the Squid Galaxy. Everything on ...

The shape of the universe is not something we often think about.

Positive curvature, like that on a sphere, implies a finite universe, while zero curvature, as on a flat plane or negative ...

This video explores the question of why the sky is dark, examining key concepts such as the infinite nature of the Universe and Olber’s Paradox. Chapters: 00:00 Introduction 00:53 Why is the sky dark?

This problem has stumped scientists for thousands of years. In this video, we explore: - Why is the sky dark? (00:53) - Is the Universe Infinite? (02:18) - Solving Olber’s Paradox (05:32) - What is ...

We preselected all newsletters you had before unsubscribing.

Doesn’t seem like much of a brainteaser, does it? Everyone knows the sky darkens at night because the sun sets … or more accurately, because our part of planet Earth rotates away from the sun, and ...