Why do babies, whose parents are close relatives, more likely to be retarded?
This is probably due to the fact that close relatives share many closely similar genes. The children that they have are more than likely to inherit these genes. While this seems fine when the genes are to do with colour of hair and so on, the serious side appears when the genes carry defects.
While members of the family may be carriers of certain hereditary defects (recessive genes), when they have children with someone not a family member who does not share this gene, the defect may remain hidden. But when they have children with a family member, who is more likely to carry the same defect or weakness in the gene, the child is also more likely to inherit the defect.
Inbred children may well be normal, but there is a heightened risk of inheriting genetically related diseases such as haemophilia, and may suffer birth defects such as extra fingers or toes. In a study of Japanese children from birth to 10 years of age, a professor of human genetics found that the death rate among inbred children was 1.5 per cent higher than all other children.
Will people be attacked by thunder when they are bathing?
Actually, thunder is the sound you hear when air expands explosively as it is heated by lightning. Lightning occurs when the electrical charges in clouds rub against each other. So lightning is really electricity, and thunder is the sound that comes with it.