
One procedure has enabled the births of more than 10 million babies around the world, and nearly 3 percent of United States births per year — and it only became available relatively recently. People have had children via in vitro fertilization, or IVF, since 1978, though it took around a decade for the technique to become more widely accessible. Boston-based physician John Rock was the first to test the technique with human eggs. Lab technician Miriam Menkin assisted him by extracting eggs from ovaries removed from hysterectomy patients. She put these eggs in solution, cultured them, and added sperm in a petri dish. Over nearly six years, she attempted to fertilize more than 100 eggs without success. Finally, in February 1944, she saw success after increasing the contact between the sperm and egg from 30 minutes to an hour — an accidental adjustment because she, the mother of an infant, had fallen asleep during the experiment. (via Nautilus)
Some people are literally allergic to the cold and it can kill them if they are unprepared

It’s safe to say that most people don’t love the cold weather. It’s uncomfortable, you need to wear layers, and the bite in the air can physically hurt. But for some people, cold weather could actually kill them. There’s a real medical condition behind that sentence, and it’s called cold urticaria. It’s a rare disorder where exposure to cold temperatures causes the immune system to misfire. Instead of adapting to a temperature drop, the body reacts as if it’s under attack. Skin can erupt into hives. Swelling can spread across the whole body. Blood pressure can drop. In severe cases, the reaction escalates into anaphylaxis. Cold urticaria has been documented for centuries. Today, researchers know the condition affects about six out of every 10,000 people and appears nearly twice as often in women as in men. Symptoms usually begin in early adulthood, but children and older adults can develop the condition too. (via Vice)
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