Britain and its Empire lost almost a million men during World War One; most of them died on the Western Front. Stretching 440 miles from the Swiss border to the North Sea, the line of trenches ...

Here's how early humans spread from East Africa all around the world. Produced by Alex Kuzoian Follow BI Video: On Facebook More from Science It's tough to know what happened on Earth thousands of ...

Here's how early humans spread from East Africa all around the world. Produced by Alex Kuzoian Follow BI Video: On Facebook More from Science It's tough to know what happened on Earth thousands of ...