"The continuing high level of infection and the fact that the end of the lockdown is not foreseeable for the time being make a resumption of trade fair operations at the end of April appear increasingly unrealistic", states Wolfram N. Diener, CEO of Messe Düsseldorf.

"We have reassessed the situation with our partners and jointly decided to cancel boot 2021 early. Our priority is the health and planning security of our exhibitors, visitors and service providers. All activities will now be focused on the successful staging of boot 2022."

Zoologist Douglas Bastos from the National Institute of Amazonian Research in Manaus, Brazil, and his team have captured video footage of Volta’s electric eels hunting in groups of more than 100.

In the footage, the eels encircled shoals of tetra fish to form a “prey ball”, which they herded toward shallower waters. Then, two to ten of the eels swam closer to the ball to deliver jolts of electricity. The synchronised charge is so powerful that some of the fish are blasted out of the water. Stunned, they fall back into the water, and are consumed by the eels.