The earliest evidence of human inhabitants of modern day Chihuahua was discovered in the area of Samalayuca and Rancho Colorado. Clovis points have been found in northeastern Chihuahua that have been dated from 12,000 BC to 7000 BC. It is thought that these inhabitants were hunter gatherers. Inhabitants of the state later developed farming with the domestication of corn. An archeological site in northern Chihuahua known as Cerro Juanaquena revealed squash cultivation, irrigation techniques, and ceramic artifacts dating to around 2000 BC.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What range of years are the oldest ruins from?
Ah, so.. 12,000 BC to 7000 BC

Birds need to alter their metabolism in order to meet the demands of migration. The storage of energy through the accumulation of fat and the control of sleep in nocturnal migrants require special physiological adaptations. In addition, the feathers of a bird suffer from wear-and-tear and require to be molted. The timing of this molt - usually once a year but sometimes twice - varies with some species molting prior to moving to their winter grounds and others molting prior to returning to their breeding grounds. Apart from physiological adaptations, migration sometimes requires behavioural changes such as flying in flocks to reduce the energy used in migration or the risk of predation.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): When do birds molt?
Ah, so.. varies with some species

An independent test in 2009 uploaded multiple versions of the same song to YouTube, and concluded that while the system was "surprisingly resilient" in finding copyright violations in the audio tracks of videos, it was not infallible. The use of Content ID to remove material automatically has led to controversy in some cases, as the videos have not been checked by a human for fair use. If a YouTube user disagrees with a decision by Content ID, it is possible to fill in a form disputing the decision. YouTube has cited the effectiveness of Content ID as one of the reasons why the site's rules were modified in December 2010 to allow some users to upload videos of unlimited length.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What happened to the sites rules in Dec. 2010?
Ah, so..
were modified