Houston was founded in 1836 on land near the banks of Buffalo Bayou (now known as Allen's Landing) and incorporated as a city on June 5, 1837. The city was named after former General Sam Houston, who was president of the Republic of Texas and had commanded and won at the Battle of San Jacinto 25 miles (40 km) east of where the city was established. The burgeoning port and railroad industry, combined with oil discovery in 1901, has induced continual surges in the city's population. In the mid-twentieth century, Houston became the home of the Texas Medical Centerthe world's largest concentration of healthcare and research institutionsand NASA's Johnson Space Center, where the Mission Control Center is located.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): For what battle was Sam Houston known as commander?
Ah, so.. Battle of San Jacinto

Aspiration has varying significance in different languages. It is either allophonic or phonemic, and may be analyzed as an underlying consonant cluster.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Aspiration can differ in which two languages?
Ah, so.. unanswerable

The Feynman Lectures on Physics is perhaps his most accessible work for anyone with an interest in physics, compiled from lectures to Caltech undergraduates in 196164. As news of the lectures' lucidity grew, professional physicists and graduate students began to drop in to listen. Co-authors Robert B. Leighton and Matthew Sands, colleagues of Feynman, edited and illustrated them into book form. The work has endured and is useful to this day. They were edited and supplemented in 2005 with "Feynman's Tips on Physics: A Problem-Solving Supplement to the Feynman Lectures on Physics" by Michael Gottlieb and Ralph Leighton (Robert Leighton's son), with support from Kip Thorne and other physicists.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Which addendum was removed from the Lectures book in 2005?
Ah, so..
unanswerable