Language-learning app Duolingo is looking to make a shift and has killed off its owl mascot. But rather than just switching ...

Farmers and landowners are contending with a new pest — the invasive hybrid fire ant that’s marching into fields and pastures ...

“The ants spray the jays as an enemy,” says Tautz. While the birds appear unharmed, the toxin is powerful enough to disperse or kill parasites, such as mites and lice, that they carr ...