Why White Dwarf Stars Unexpectedly Cease Cooling Down Fraser CainSome ‘lifeless’ stars cover celestial fountains of youth beneath their surfaces House.comWhite Dwarfs May Be Much less Lifeless Than We Thought Universe TodayAstrophysicists unveil new phenomenon difficult textbook definition of white dwarf stars Phys.orgWeird floating crystals can cease stars ageing for billions of years New Scientist