Careers in Veterinary Medicine Become a veterinarian and make a difference. Embark on an exciting career path in veterinary medicine, where you can put your knowledge and compassion into practice. Preventing disease and healing animals is at the heart of what veterinarians do. But they also do so much more.
The simple reason behind Marsâs reddish appearance is the layer of iron oxide dust covering the planetâs surface. Fine particles of various oxides of iron (hematite) and trace amounts of some elements like chlorine and sulfur on the Marâs surface is the main reason for its reddish color.
Two types of pigment give hair its color: eumelanin and pheomelanin. Pheomelanin colors hair orange and red. All humans have some pheomelanin in their hair. Eumelanin, which has two subtypes of black or brown, determines the darkness of the hair color.