And when biologists think it is too complicated, they give the problem to the sociologists. All his feathers are combed over to one side. Enzymes are things invented by biologists that explain things which otherwise require harder thinking. When you breath, you inspire. When you do not breath, you expire.
Mushrooms always grow in damp places and so they look like umbrellas.
Thesaurus is an ancient reptile with an excellent vocabulary. It has recently been discovered that research causes cancer in rats. Before giving a blood transfusion, find out if the blood is affirmative or negative. Genetics explain why you look like your father and if you don't why you should. Dew is formed on leaves when the sun shines down on them and makes them perspire.