Conversation so far:
who mapped the coastline of texas in 1519
Sailing from a base in Jamaica, Alonso Alvarez de Pineda, a Spanish adventurer, was the first known European to explore and map the Texas coastline.
who colonized texas
Anglo-American colonization in Mexican Texas took place between 1821 and 1835. Spain opened Texas to Anglo-Americans in 1820, less than one year before Mexico achieved its independence.
when did texas become a state
On December 29, 1845, Texas entered the United States as a slave state, broadening the irrepressible differences in the United States over the issue of slavery.
what about california when did it become a state
California became the 31st state on September 9, 1850. The Golden State’s rich history has since been shaped by people of every ethnic background who traveled here.

Question: and alaska
Self-contained rewrite: and alaska when did they become a state