Even though it is nearly twice as far away from the Sun as Mercury, Venus is by far the hottest planet.

Domestic cats love to play, this is especially true with kittens who love to chase toys and play fight. Play fighting among kittens may be a way for them to practice and learn skills for hunting and fighting.

The system of democracy was introduced 2 500 years ago in Athens, Greece. The oldest existing governing body operates in Althing in Iceland. It was established in 930 AD.

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