Why do you think people live shorter than before?

I think mainly because of our lifestyle. The food we eat has more chemicals and artificial ingredients. The air we breathe is a lot more polluted. As they say, technology and development has it's advantages and disadvantages..

HAHAHHAA is this a big joke? XD 500 years for a humanbeing? At the bible time they were small kids max 30 years old all dying 24/7. That's why we have the stupid religions that ruin our lifes after so many years... Living in a fish...

I think it depends on where you are. People in developed countries have a higher life expectancy, about 70 for women and the men, about 60. This is due to better health care, better food, quality of life and the like. However, people in developing countries have shorter life expectancies because of diseases and absence of health care. People in poorer countries often have low or no incomes at all thereby limiting their capacities to buy food for themselves. They also end up being malnourished, under nourished and get all sorts of diseases/sickness. In addition, wars and famines or natural calamitie can shorten the life of people. Again, this is very prevalent in poor or developing countries.