World
| Ski-through:
McDonald's opened the first ski-through in the Lindvallen resort (Sweden).
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| Ecology
| Cigarette filters:
A cigarette filter dissolves in the soil for whole 10 years!

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Human Body
| Body dysmorphia:
Body dysmorphia is a psychological disorder in which a person is excessively concerned with a perceived defect in his/her body. In some pathological cases, he/she may even think that the defect in their body is their arm or leg and even want to get rid of it.
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| World
| Pentheraphobia:
Pentheraphobia is phobia from your mother-in-law (very common, I'm sure).
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Animals
| Chihuahua:
The Chihuahua was named after the state "Chihuahua" in Mexico.

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| World
| Mexico:
Texas was once part of Mexico(until 1836 when Texas won its independence).

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World
| Mexico:
The original name of Mexico is Estados Unidos Mexicanos(United Mexican States).

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| Space
| The Lunar Laser Ranging Experiment:
The astronauts Neil Armstrong and Buzz Aldrin left mirrors on the Moon(July 21 1969). The reason for this was to conduct an experiment (which is still ongoing) to measure the distance from Earth to Moon with lasers.

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Animals
| Mosquito's diet:
Mosquito's diet does not consist only of blood (and as we all know - only female mosquitoes bite). Actually, most of their diet consists of nectar. The females need the blood to produce healthy eggs.

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| Animals
| Mosquitoes:
Mosquitoes are attracted by carbon dioxide. Not only they sense it, but they sense other chemicals in the carbon dioxide which are actually called carbon dioxide signature(and can be used as a fingerprint to identify people!). Depending on your carbon dioxide signature, mosquitoes will like you more or less as a blood donor than other people.
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