Leo Loved Animals

200

Leonardo da Vinci loved animals. He would often buy animals in cages just so he could set them free.

A Candle’s Flame

341

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

413

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

226

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

533

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.

YakhchÄl 

431

As early as 400 BCE, Persians engineered ancient refrigerators called YakhchÄl. They enjoyed ice in the heat of the desert.