What are the particles which continually pass through our bodies called?

• neutrinos
• merinos
• adipos

Neutrinos are emitted by stars at a speed close to the speed of light. Each second, without our being aware of it, several hundred billion of these particles pass through our body.

Which insect gives birth to its children and grandchildren at the same time?

• the aphid
• the ladybird
• the scarab

The female aphid is capable of reproducing without the help of a male. Only females are then produced. These start to reproduce when they are still in their mother's abdomen. The aphid thus starts off two generations at the same time.

Which country draws 40% of its electricity from the natural heat of the Earth?

• Tanzania
• Mozambique
• El Salvador

Geothermal energy, from the depths of the Earth, can prove to be very profitable where easily accessible. This is exactly the case in zones situated on volcanic chains.

What percentage of human genes is utilised by the brain only?

• 30%
• 50%
• 90%

The brain uses 50,000 of our 100,000 genes for its own construction and functioning.

Who invented peanut butter?

• the Egyptians
• the Incas
• chimpanzees

Originally from the Americas, the peanut produces its seed underground. The popular peanut butter was invented more than 500 years ago.

What is unusual about the koala, an Australian marsupial?

• it can live for 100 years
• it only eats eucalyptus leaves
• its blood is dark blue

The food of the koala is limited to the buds and leaves of the eucalyptus, which it digests with its specifically-adapted digestive system. If eucalyptus were to disappear, so would the koala.