A closer look
We complain about bad weather today, but climatologists are literally reading half-million-year-old weather reports trapped in solid ice. When snow falls in the Antarctic, it traps ambient air before compressing into ice, effectively creating tiny atmospheric time capsules. By drilling down over two miles into the Vostok station ice sheet, scientists extract these ancient bubbles and measure the ratio of oxygen-18 to oxygen-16. Since heavier isotopes require more thermal energy to evaporate, this tiny chemical fraction acts as an ultra-precise thermometer, revealing exactly how hot or cold the planet was before modern humans even existed.
