Since people today are living longer, a person may be able to know four generations of her progeny.
The word progeny means a descendant or descendants of a person. One of the major reasons why people are living longer today is, medical technology and medicines have improved so much that it is now common for people, in First World Countries, to live until they are over 80 years old. There is also a lot more good quality food that is readily available. This also helps the longevity of people.
