For the first time since the 1970s, researchers have made enough of the element einsteinium to experiment with it.
Einsteinium’s shortest half life is just six seconds for the isotope einsteinium-240, but the half life for the einsteinium-254 that scientists made in this reaction is 276 days. That means scientists have a lot of study time before the element breaks down into extremely dangerous and radioactive berkelium, and the sample is housed in a special container to prevent any harm to those who handle it.
For more, check out this Popular Mechanics story.