16. The average person accidentally eats 430 bugs each year of their life.
17. A single rye plant can spread up to 400 miles of roots underground.
18. The temperature on the surface of Mercury exceeds 430 degrees C during the day, and, at night, plummets to minus 180 degrees centigrade.
19. The evaporation from a large oak or beech tree is from ten to twenty-five gallons in twenty-four hours.
20. Butterflies taste with their hind feet, and their taste sensation works on touch – this allows them to determine whether a leaf is edible.