Darker skin tends to be more acne-prone because it has larger sebaceous glands that produce more oil. Those with darker skin are more likely to experience post-inflammatory hyperpigmentation (PIH), dark spots that linger for weeks or months after acne has healed, caused by the overproduction of melanin.
If the hole had reached the initial goal of 15,000 meters, temperatures would have reached a projected 300Â°C (572Â°F). When drilling stopped in 1994, the hole was over seven miles deep (12,262 meters), making it by far the deepest hole ever drilled by humankind. The last of the cores to be plucked from from the borehole were dated to be about 2.7 billion years old, or roughly 21 million times older than Coca Cola.
Near the southern tip of the crescent, there is a small slot-shaped area called the âChallenger Deep.. With a measured depth of approximately 36,000 feet below sea level, a journey to the bottom of the Challenger Deep is nearly seven miles, making it the deepest known place on Earth. To give you an idea of just how deep the Mariana Trench is, if Mt. Everest were placed in the deepest part, there would still be over a mile of water above its peak!