Pediatric patients with sympathomimetic toxicity present with the same signs and symptoms observed in adults. One study noted that some pediatric patients with sympathomimetic toxicity initially presented with inconsolable crying, vomiting, and abdominal pain.
For the next 24 years, they drilled on and off into the Earthâs crust. The result was the Kola Superdeep Borehole and a drill-depth of more than 7.5 miles (12 kilometers). To put that in perspective, Kola descends further than the deepest point of the ocean, which lies at nearly 6.8 miles (11 kilometers). The borehole is located on the Kola Peninsula of Russia.
The Biggest Man-Made Hole on Earth. A few weeks ago, we looked at a photo essay on Mir Mine, a nearly mile-wide mine in Eastern Siberia that's one of the largest man-made holes on Earth's surface. It made us wonder: Where the largest hole ever made by humans? As it turns out, it's right here in the United States.