A Candle’s Flame

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The human eye is so sensitive that if the earth were flat and it was a dark night, a candle’s flame could be seen from 30 miles away.

The Strongest Material Known To Man

349

Graphene is the strongest material known to man. It’s 200 times stronger than steel. It would take an elephant to break a sheet as thin as a piece of paper.

1,700 Words

167

William Shakespeare is credited with the invention or introduction of over 1,700 words that are still used in English today.

The World’s Longest Road

338

The world’s longest road to walk is from Cape Town, South Africa to Magadan, Russia. It’s 22,387 km/13911 mi long. Along the way, you pass thru 17 countries, 6 time zones, & all seasons of the year.