Prove the scientific consensus and win a prize: A time-dishonored PR ploy used by cranks, quacks, and pseudoscientists (Robert F. Kennedy Jr. edition)
Last week, antivaccine activist Robert F. Kennedy, Jr. teamed up with Robert De Niro to issue a challenge to provide one scientific study that proves thimerosal in vaccines is safe, with a cash prize of $100,000. They thus joined a long line of antivaxers, creationists, and climate science denialists offering money to "prove" the scientific consensus. Science doesn't work that way.
A man named Jock Doubleday has offered $150,000 to any physician who gives vaccines to drink the chemicals in a vaccine. It's a profoundly dishonest challenge, so full of conditions that it's clear it was meant never to be honored, much less paid.