Time (Observation: 2/5)

What number are you?

Its estimated about 100 billion humans have lived on earth since their evolution began between 400,000 - 250,000 years ago

Links:
http://en.wikipedia.org/wiki/Human_evolution
http://en.wikipedia.org/wiki/Human_population
http://photography.nationalgeographic.com/staticfiles/NGS/Shared/StaticFiles/Photography/Images/POD/t/trichur-pooram-crowd-508657-sw.jpg

Space (Observation: 1/5)

Can you spot Earth in this vastness?

Artist's concept of the Milky Way galaxy

Links:
http://planetquest.jpl.nasa.gov/news/hurt_milky_way_image.html
http://www.news.wisc.edu/11405
http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/021127a.html