Life on Earth began 4 billion years ago during the Hadean Aeon. The origin of life, called abiogenesis, is still not fully understood. The earliest known life forms were prokaryotic cells, followed by photosynthetic cyanobacteria that caused the oxygen catastrophe. Eukaryotic cells evolved 2.1 billion years ago, and complex multicellular organisms emerged 600 million years […]
Miliaria crystallina, or sudamina, is a mild form of heat rash caused by blocked sweat glands that results in small, fragile blisters. It can be prevented by allowing sweat to evaporate and avoiding overheating the skin. Treatment includes cold compresses, calamine lotion, and topical steroids in severe cases. It is common in tropical climates, excessive […]
