Why does space look dark if the universe is full of stars? This was the question asked by Heinrich Wilhelm Olbers in 1823. From there came the famous "Olbers Paradox." It tells us that, in a static ...

Add Yahoo as a preferred source to see more of our stories on Google. Astronomers have to use indirect evidence, like the explosions of Type Ia supernovae, to investigate the impacts of dark energy.

A simple question with a profound answer: why is space dark? It's not about a lack of light; billions of stars flood the universe with it. The secret lies in the one thing Earth has that space doesn't ...

Now is a surreal time to be a dark matter researcher. Even as research funding is being cut by governments around the world, dark matter remains one of the biggest and most exciting open problems in ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...