Final Takeaway
Earth won’t stay the same forever. As the Sun brightens and carbon dioxide levels drop, Earth’s oxygen supply will fade. This transformation may take a billion years, but it reveals how temporary Earth’s habitability might be.
More importantly, the study equips scientists with better tools to look for life on other planets. By studying how Earth’s air changed, we begin to see our home in a much broader cosmic context. In that sense, understanding our ending helps us better appreciate the present and everything we stand to lose.
Read More: Wife of ‘Stranded’ NASA Astronaut Shares Struggles with His Health After Nine-Month Space Mission