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Where Did Shoes Come From?

Where Did Shoes Come From?
Ooh, aah, ouch! People in ancient times must have yelped like this when they walked on rough ground without any shoes on. And it was probably the pain and discomfort that propelled them to cover their feet for protection.Footwear has a history which goes back many thousands of years, and has long been an article of prestige for people...

Sea level does not always stay the same…

Sea level does not always stay the same. During the last Ice Age, 18,000 years ago, sea level was about 122m (400ft) lower than it is today. It was possible to walk between England and France. Since then, the sea level has risen by about 8 cm (3in) every 100 years.

Why can’t the Sun melt Snow?

Why can’t the Sun melt Snow?
There are some things in nature that have a great capacity to toss back or reflect a great deal of the sun’s light that falls on them. One of them is snow. Newly formed snow reflects about 90 per cent of the sunlight that falls upon it. This means that the sun is powerless to melt clean snow. And...

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