There are total color blindness and partial color blindness. Partial color blindness, i.e. Can see some color, is much more common than total color blindness, i.e. See all colors in black and white. Among partial color blindness, there are two types:... (read more)

Color blindness is most often of genetic nature, i.e. You get it from your parents. In 1798, John Dalton, an English chemist, published the first scientific paper on color blindness -- "Extraordinary facts relating to the vision of colours" after... (read more)

To understand what causes color blindness, you need to understand how your eyes see objectives. Our eyes see objectives by light stimulating the retina, a neuro-membrane at the back of the eyes. The retina is made up of Rods and Cones. While the rods... (read more)

Color blindness, also called color vision deficiency, is the decreased ability to see the difference between certain colors. Color blindness can make matching your clothes and accessories difficult, but it does not cause serious problems, and is usually... (read more)

Well, the most simple way to find if a person speak English or not, is to ask them a question in English, such 'Do you speak English?' If they can not understand that, then its definitely a NO. 'Do you speak English?' can be translated as '你会说英文吗?'... (read more)

Cheers can be translated as '干杯' in Chinese. It is pronounced as 'gān beī' in Mandarin. Note, both words are first tones. You can how to pronounce the four tones correctly by following this video - (read more)

In China, there are many dialects, but most people in China understand and can speak mandarin in addition to their own local dialect. However, although there are many different ways to speak Chinese, there are only two ways to write it: Simplified Chinese... (read more)

Asthma does not usually cause any significant harm to the pregnancy. However, severe asthma may cause premature labor or restrict the baby's growth. During pregnancy, the demand for oxygen increases by about 50%. If you have asthma, you may feel even... (read more)