All elements above uranium are artificial and man made. These man made elements are created in a nuclear lab, cyclotron, nuclear power plant or in a high energy particle research facility by nuclear scientists. As the chemist explains in the video above, curium is an element that you do not want to mess around with, because it is too radioactive and dangerous.
via Curium Is A Long Lived Radioactive Heavy Metal Poison Isotope, 300 Times More Deadly Than Plutonium, Half Life Of 15 Million Years, NASA Uses It In Space – What Happens In Case Of Accident? Negative Transmutation Poison Chain | A Green Road Journal