Researchers are trying to understand how prolonged cannabis use can affect young people. Plus, a ‘biocomputer’ combines lab-grown brain tissue with electronic hardware and COP28 overruns amid a deadlock over the phasing out of fossil fuels. Researchers are trying to understand how prolonged cannabis use can affect young people. Plus, a ‘biocomputer’ combines lab-grown brain tissue with electronic hardware and COP28 overruns amid a deadlock over the phasing out of fossil fuels.