Live Science spoke with animal researcher Andreas Nieder about how animals process mathematical concepts like statistical reasoning and the idea of zero.
Source: [Live Science](https://www.livescience.com/animals/birds/they-reliably-chose-the-statistically-more-favorable-option-a-crow-researcher-explains-how-these-winged-geniuses-process-numbers-and-what-it-could-reveal-about-human-math-smarts)