Universe is 14 billion years old (4.3×10^17 seconds)
- Sun is 4.57 billion years old
- Earth is 4.54 billion years old
- Life is 3.8 billion years old
- Mammals are 225 million years old
- Humans are 200,000 years old
- Religion is 102,000 years old
- Cities are 5,000 years old
- China is 4,085 years old
- Judaism is 3,828 years old
- Hinduism is 3,100 years old
- Rome is 2,768 years old
- Democracy is 2,525 years old
- Christianity is 1,985 years old
- London is 1,973 years old
- Islam is 1,450 years old
- Gun powder is 972 years old
- The telescope is 408 years old
- New York is 351 years old
- America is 240 years old
- The locomotive is 204 years old
- The repeating rifle 167 years old "
- “On the Origin of Species” is 156 years old
- Dynamite is 148 years old
- Radio is 120 years old
- Nuclear weapons are 70 years old
- The worldwide web is 24 years old