New observations of the cosmos show that the dark energy, a mysterious force that accelerates the expansion of the universe, ...

His theory of special relativity stemmed from his desire to understand the nature of light and what would happen to objects moving near or at the speed of light. This led him to develop the ...

If they could afford this novelty, they had a better chance of striking a light, but not of surviving. Comments are closed for this object What's this? Most of the content on A History of the ...

It didn't occur to me until some time after I bought it, but this is the direct ancestor of the disposable plastic cigarette lighter. Apart from being made of silver, it works in nearly the same way.