Astatine’s rarity may  
  save us from cancer
Janet Kuypers 
1/15/22 Twitter-length Periodic Table poem 
for element #85, Astatine (At), and isotope Astatine-211 (211At) 
#janetkuyperstwitterverseperiodictablepoem 
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You come from the decay of others, 
radioactive destruction in your wake. 
One of the rarest elements on earth, 
you’re so unstable, but a part of you, 
Astatine-211, may weakly penetrate 
cancer cells. Could this rare element 
have saved my mother, before cancer 
took her away forever— 
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