\line{%
  \hfil
  \picture{img/corner-settle.jpg}{An antlion settled in the corder of the $12\times12$ trial, which became a common settlement pattern throughout the first 4 trials. }{4in}
  \hfil
  \picture{img/fake-pits.jpg}{An image depicting the fake pits that were introduced to the $24\times24$ trial, where a total of 12 fake pits were introduced, each with a pit depth of 5cm and a pit width of 8cm.}{4in}
  \hfil
}