Researchers at the University of Tübingen in Germany have new evidence suggesting crows can contemplate the number zero. This ability means the birds join an “elite” group of creatures that can ...
It's quick and easy to access Live Science Plus, simply enter your email below. We'll send you a confirmation and sign you up for our daily newsletter, keeping you up to date with the latest science ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results