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What is a Coronavirus?

By Momi on
What is a Coronavirus?

Coronaviruses refer to a group of viruses that cause diseases in humans, animals and birds. In humans, several coronaviruses are known to cause respiratory infections ranging from the common cold to more severe diseases such as Middle East Respiratory Syndrome (MERS) and Severe Acute Respiratory Syndrome (SARS).

There are other symptoms in case of animals, for example, they cause an upper respiratory tract disease in chickens, while in cows and pigs they cause diarrhea.

How to Make a Paper Airplane

By MariaS on
Paper Airplane

To make a paper airplane, follow these steps:

Start with a piece of paper: Use a standard 8.5x11 inch (A4) paper.

Fold the paper in half: Fold the paper in half lengthwise and crease the fold.

Fold the top corners: Fold the top corners of the paper down to the center crease to form a point.

Fold the point down: Fold the pointed tip down to meet the bottom edge of the paper.