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Where is everybody?

Are we alone? The universe is very big. Why do...

Who invented the constellations? The constellations that we use to...

Is there an 'echo' of the big bang? The story...

Einstein predicted that gravitational waves exist. What are they, how...

In 1945, the imperial possessions of Great Britain circled the...

The scramble for Africa in the 1880s saw the unclaimed...

British interest in Egypt, still nominally part of the Ottoman...

This lecture focuses on the second hundred years of the...

For a period of over 200 years, starting in the...