The World Natural Heritage sites are some of the most stunning places on Earth. They are all unique and cannot be replaced. They have a special look to them and are often visited by tourists. These locations stand out, and one of the most beautiful sites are the karst or limestone landscapes. Located in China, Huangguoshu Scenic Area is one stunning example. The are...

Diabetic retinopathy is a big problem for people with diabetes. It's a condition that affects the eyes and can lead to blindness. One of the key signs of this condition are exudates, which are like yellowish patches that show up in the retina. Doctors need to spot these patches to see how bad the condition is and how it's spreading. But, the patches can show up in di...