(CNN) — Perhaps “birdbrained” isn’t such an insult after all –– crows, the ubiquitous urban bird, can vocally count up to four, the latest research has found. Not only can the inquisitive creatures ...

For a long time, people have been wondering if monkeys can actually count. It’s not like humans, who just get numbers naturally. Monkeys have to figure it out in their own way. Some recent research ...