California's 'Very Large Colony' of Argentine ants stretches from San Diego to San Francisco. About how many ants live in it?

The answer

Most ants are territorial and attack rivals on sight. Argentine ants aren't — colonies from different nests treat each other as kin, so instead of staying separate they just keep merging. That's how California ended up with a single colony stretching from San Diego to San Francisco, with a population scientists peg at nearly a trillion.

Correct answer: Nearly one trillion