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Ironically, Bingham actually stumbled upon the ruins of the lost city on his way towards Machu Picchu, but dismissed it without much thought and continued on his journey.

The Great Wall of China cannot be seen from space by the human eye without aid.

Many factories use robots to do hard work quickly and without many mistakes.

Because it takes a long time to send a radio signal from Earth to another planet, the robots do much of their work alone, without commands from Earth.

The Aztecs adopted human sacrifice from earlier cultures (such as the Olmecs) because they believed the universe would come to an end and the sun would cease to move without human blood.

You can't travel to Bali Indonesia without running into these furry and adventurous animals.

So without further ado here are 100 cute facts about cats and kittens!

No American household is complete without a furry little friend.

The process of surfacing and breathing is automatic, and even a hippo sleeping underwater will rise and breathe without waking.

The more debt you have, the less people will want to give you things without your paying full price for them.

The first use of virtual reality would be in 1962 with the creation of the light pen, a device capable of writing on a computer without the need for physical ink.

However, Gates was more interested in pursuing his own coding, and when he saw an opportunity to found his own company, he dropped out of Harvard without finishing his course.

They can go without water for weeks.

Twitter's early days were not without their problems.

While a group of any peafowl is called a harem, a group of females are known as a bevy, a muster or a party when they are in groups without the males.

If you've ever been to Amsterdam then you will know you can't walk for more than five minutes without crossing a bridge or seeing a canal!

1 in 7 15-24 year olds claim life without chocolate is not worth living.