Why is sunscreen so important? Sunscreen is vital even on overcast days because it protects us from harmful ultraviolet rays. These rays can lead to skin cancer discoloration and wrinkles if we have prolonged exposure. It is also important in Egypt especially for holiday goers visiting the beach as the sun is strong and many people every year suffer from heat stroke and sunburn. Factors and exposure Healthcare professionals strongly advise people to wear at least factor 30 (adult) and factor 50 ...
Rays are found in seas and oceans all over the world. There are over 500 species of rays most of which can be found dominating the sea bed. They have flat bodies so they can conceal themselves in the sand easily and attack unsuspecting prey. Most species of stingray have 5 gill slits and their eyes are on the top of its body. Rays are distant cousins to sharks so have some similar qualities. For example rays and sharks use smell and electroreceptors to hunt their prey; this is particularly true ...