In case it amuses anybody, I have put together the following data from 
Wikipedia:

1.000 * 10^0 sec = 1 second.

1.000 * 10^1 sec = 10 seconds.
6.000 * 10^1 sec = 1 minute.

6.000 * 10^2 sec = 10 minutes.
9.000 * 10^2 sec = 15 minutes = 0.25 hours.

1.800 * 10^3 sec = 30 minutes = 0.5 hours.
3.600 * 10^3 sec = 60 minutes = 1 hour.

2.880 * 10^4 sec = 8 hours.
4.320 * 10^4 sec = 12 hours = 0.5 days.
8.640 * 10^4 sec = 1 day.

6.048 * 10^5 sec = 7 days = 1 week.
8.640 * 10^5 sec = 10 days.

1.209 * 10^6 sec = 14 days.
2.592 * 10^6 sec = 30 days = Roughly 1 month.
8.640 * 10^6 sec = 100 days = Roughly 3-4 months.

1.577 * 10^7 sec = 0.5 years = 6 months.
2.366 * 10^7 sec = 9 months.
3.155 * 10^7 sec = 1 year.

3.155 * 10^8 sec = 10 years.

1.577 * 10^9 sec = 50 years.
3.155 * 10^9 sec = 100 years = 1 century.
4.102 * 10^9 sec = 130 years = Electric light, recorded round, 
telephone, etc.
5.206 * 10^9 sec = 165 years = Orbit of Neptune.
5.806 * 10^9 sec = 184 years = Beethoven's 9th symphony.
6.910 * 10^9 sec = 219 years = French revolution.
7.321 * 10^9 sec = 232 years = USA formed.

1.243 * 10^10 sec = 394 years = Shakespear's last play.
1.625 * 10^10 sec = 515 years = Columbus finds America.
1.751 * 10^10 sec = 555 years = Oldest SURVIVING printing press.
2.161 * 10^10 sec = 685 years = The Devine Commedy.
3.155 * 10^10 sec = 1,000 years = 1 millenium.
4.831 * 10^10 sec = 1,531 years = Fall of Roman Empire.
4.891 * 10^10 sec = 1,550 years = First Anglo-Saxon invasion.
6.081 * 10^10 sec = 1,927 years = Pompeii razed by volcanoe.
6.336 * 10^10 sec = 2,008 years = Birth of Jesus Christ.
7.352 * 10^10 sec = 2,330 years = Death of Alexander the Great.
7.592 * 10^10 sec = 2,406 years = Death of Socrates.
7.889 * 10^10 sec = 2,500 years = Euclid's Elements.
8.779 * 10^10 sec = 2,782 years = Rome founded.

1.199 * 10^11 sec = 3,800 years = Alphabetic writing.
1.420 * 10^11 sec = 4,500 years = Domestic horse.
1.441 * 10^11 sec = 4,567 years = Great Pyramid, Giza.
1.704 * 10^11 sec = 5,400 years = Start Bronze Age.
1.803 * 10^11 sec = 5,715 years = Halflife carbon-14.
2.051 * 10^11 sec = 6,500 years = The wheel.
3.155 * 10^11 sec = 10,000 years = End last glacial age.
3.471 * 10^11 sec = 11,000 years = Jericho founded.
3.786 * 10^11 sec = 12,000 years = Start Neolithic.
6.626 * 10^11 sec = 21,000 years = End last Glacial Maximum.
9.151 * 10^11 sec = 29,000 years = Neanderthals died out.

3.155 * 10^12 sec = 100,000 years = Domestic dogs.
4.733 * 10^12 sec = 150,000 years = Mitochondrial Eve.
7.889 * 10^12 sec = 250,000 years = Homo sapiens.

2.492 * 10^13 sec = 790,000 years = Homo erectus first uses fire.
7.889 * 10^13 sec = 2.5 million years = Homo habilis.

1.262 * 10^14 sec = 4 million years = End last Ice Age.

1.072 * 10^15 sec = 34 million years = First cats.
2.051 * 10^15 sec = 65 million years = Start of Tertiary. End of dinosaurs.
6.153 * 10^15 sec = 195 million years = Start of Jurassic. First mammals.
7.889 * 10^15 sec = 250 million years = Galactic year. (1 revolution 
around Milky Way.)
7.933 * 10^15 sec = 251.4 million years = Start of Triassic. Permian 
extinction. Age of the dinosaurs.

1.072 * 10^16 sec = 340 million years = Start of Carboniferous.
1.672 * 10^16 sec = 530 million years = Cambrian explosion. First 
vertabrates.
1.704 * 10^16 sec = 540 million years = Start of Cambrian.
2.220 * 10^16 sec = 703.8 million years = Halflife uranium-235.
4.029 * 10^16 sec = 1,227 million years = Halflife potassium-40.

1.293 * 10^17 sec = 4.1 billion years = Oldest life on Earth.
1.409 * 10^17 sec = 4.486 billion years = Halflife uranium-238.
1.420 * 10^17 sec = 4.5 billion years = Age of the Earth.
4     * 10^17 sec = 13 billion years = Age of the Universe.


-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

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