In 1911, the Dutch physicist Heike Kamerlingh Onnes cooled a thread of mercury to 4.2 kelvin in a bath of liquid helium and its electrical resistance vanished completely, and a current set circulating in a superconducting loop like that will still be flowing years later, indistinguishable from the day it beganJuly 24, 2026
‘The world feels unpredictable’: I’m 56. My husband is 64. Our mortgage costs $17K a month. Do we pay it off? Personal Finance February 19, 2026 “We paid $3.1 million for the house and owe $1.3 million on the loan.”
