We've pretty much gotten the message that we - and our dogs - need to look out for blooms of cyanobacterial (blue-green) algae on lakes. But now they may be popping up on Lake Superior. Two factors contribute to algal blooms on the big lake: warm temperatures over a period of weeks that warm the lake water, and heavy rainfalls. There's not a lot of data yet, but those conditions were present in 2012 and 2018 - and so were big blooms of blue-green algae in the big lake. So a team of researchers