Wallace Line connected islands on the west (Sumatra, Java, etc.) with the Asian continent and with similar wildlife, and islands on the east such as New Guinea were connected to Australia and were characterised by the presence of marsupials. Wallace used his extensive travel in the region to propose a line to the east of Bali since "all the islands eastward of Borneo and Java formed part of an Australian or Pacific Continent, from which they were separated." The name 'Wallace's Line' was first used by Thomas Huxley in an 1868 paper to the Zoological Society of London, but showed the line
Brett Wallace minor-league contract including an invitation to major-league spring training with the San Diego Padres. On June 19, 2015, the Padres called Wallace up. He finished the season with a .302/.374/.521 slash line in 107 plate appearances for the Padres. The following off season, the Padres and Wallace avoided arbitration by agreeing to a $1 million contract for 2016. Wallace was given the starting third base job when Yangervis Solarte was placed on the disabled list with a hamstring injury. Wallace failed to repeat his 2015 production in 2016, finishing the season with a .189/.309/.318 slash line in 256 plate appearances.