Oxygen seems to exist infinitely in the air. We learned in school that oxygen makes up roughly 21% of our atmosphere. But what would happen if this ratio were to shift? Global warming is changing the concentration of atmospheric oxygen. Burning fossil fuels directly consumes oxygen from the air on a continuous basis. However, an even greater problem lies in the oceans. As global warming raises ocean temperatures, gas solubility drops, causing dissolved oxygen in the water to plummet. Marine phytoplankton—responsible for producing nearly 70% of the Earth's oxygen—face severe threats of extinction due to rising temperatures and disrupted ocean circulation. Coupled with severe droughts and massive wildfires destroying forests (often called the "lungs of the Earth"), the planet's entire oxygen replenishment loop is under serious strain. If the oxygen ratio drops significantly , complex organisms will gradually vanish. Only certain anaerobic microorganisms and resilient m...

 Ahead of the upcoming holiday when the whole family gathers together, I would like to touch upon a sensitive topic today. It is about the inner, unspoken feelings of grandparents toward their grandchildren. "Do grandparents favor paternal or maternal grandchildren?" Here, we reveal the complex and candid feelings of grandparents. Modern grandparents show two entirely different styles of affection depending on the situation and the child. The first is the affection toward maternal grandchildren , which stems from "daily caregiving and emotional comfort." Nowadays, grandparents feel an invisible barrier called "walking on eggshells around the daughter-in-law" when dealing with paternal grandchildren. Fearing that their actions might be uncomfortable, their expressions of love become cautious and formal. On the other hand, in front of maternal grandchildren born to their own dearly beloved daughter, all defenses drop. Thanks to comfortable communication with...

Hello, everyone. Today, I would like to talk about a dark shadow that has recently emerged as a serious social issue in South Korea: drug addiction . Many people ask, "Why do people touch drugs in the first place?" The beginning is rarely dramatic. It often starts with a simple thought like "Just once won't hurt," peer pressure, or an indifferent choice to escape severe stress and pain. Recently, the barrier to access has lowered significantly, to the point where even teenagers can easily obtain drugs via social media or Telegram. However, the consequences of that single choice are disastrous. The moment drugs enter the brain, its reward system is instantly destroyed. The dopamine system—which allows us to feel joy in everyday life—becomes paralyzed, leaving the brain craving nothing but the drug. This is precisely why drug addiction is not a "matter of willpower," but a brain disease and a severe addiction . The end of addiction is the total collapse...