2. The best scientific explanation we have for how the universe came to be

3. Long, long ago (about 12-14 billion years ago), in a place far, far away... *all matter & energy were condensed in a very small space  smaller than this. *instantaneously expanded http://www.pbs.org/wgbh/nova/universe/historywave. html

4. Matter expanded from this point in all directions -balloon example As matter expanded, it cooled  atom formation  element formation Continues to expand today

5. General Theory of Relativity developed by Einstein -’new’ theory of gravity -matter tells space how to curve and space tells matter how to move

6. Cosmological Principal: matter in universe is homogeneous & isotropic (same kind of stuff) -uniform distribution of matter across space

7. Cosmic Background Radiation -discovered by Penzias & Wilson at Bell Laboratories -like an ‘afterglow’ of the Big Bang -mathematicians calculated what it should be, & that’s what it was

8. Redshift -as universe expands, galaxies are moving away from each other -light from these galaxies appear red (longer wavelengths) -discovered by Edwin Hubble

9. Redshift White light is actually a combination of all colors  spectroscopes -each color of light has its own wavelength *red = longest *blue = shortest

10. Waves of radiation can be distinguished by wavelength, which is the distance between two successive crests of the wave.

12. http://www.p bs.org/wgbh/nova/universe/moving.html Light and sound move in much the same way...

14. Man lying dead on floor -has stab wounds -bloody footprints surround body -knife found with blood on it, as well as one fingerprint

15. Another patch of blood found near door Intimate table set for two

16. Neighbor says victim recently broke up with a girlfriend with whom he always fought

17. While police are investigating the scene, a woman arrives and becomes distraught... She was supposed to have dinner with the man tonight

18. Detective has a theory: Man was killed by his ex-girlfriend. She found out he had a date with someone else and murdered him with the knife

19. The detective’s theory is based on the evidence available so far; as more evidence becomes available, his theory will either be supported more, or have to be revised

20. 1.DNA analysis indicates that the blood on the knife belongs to the murder victim 2.Blood patch separate from victim belongs to ex-girlfriend

21. Ex-girlfriend’s fingerprint is matched to the one on the knife She has a pair of shoes that make the same kind of footprint as those found near the body

22. Friends of the ex-girlfriend and the victim describe their relationship as being stormy The suspect was violent, and the victim broke up with her because of it

23. If a jury heard this evidence, what would they say about the detective’s theory? That it is a good one; it is supported by the available evidence

24. DO WE KNOW 100% THAT THIS WOMAN COMMITTED THE CRIME? WHAT IS THE ONLY WAY WE COULD KNOW FOR SURE?

25. She was the only living person who was there when it happened

26. DO WE KNOW 100% THAT THE BIG BANG IS WHAT ACTUALLY HAPPENED?

27. We weren’t there... BUT all the evidence we have gathered so far supports this theory