'Railroad systems' presentation slideshows

China Seminar Boulder, Colorado 2010

360 views • 28 slides

BOUNDARIES

BOUNDARIES. Geometric Boundaries. Boundaries that follow regular geometric patterns; usually straight lines without consideration for environment or cultural patterns. Physical Boundaries. Cultural Boundaries. Borders based on culture traits such as religion or language.

1.21k views • 27 slides

Accounts of e X tinct Species

Accounts of e X tinct Species. Passenger Pigeon ( Ectopistes migratorius ). (Rest in peace, Martha!). Distribution. the passenger pigeon lived in the eastern U.S. and was found from Canada to the Gulf of Mexico. a short-distance migrant, birds from far

368 views • 14 slides