Carrion crows can reliably caw a number of times – from one to four – on command. Plus, scientists are racing to make AlphaFold3 more accessible and a new pathway for fentanyl addiction. Carrion crows can reliably caw a number of times – from one to four – on command. Plus, scientists are racing to make AlphaFold3 more accessible and a new pathway for fentanyl addiction.