ALT A three-column infographic highlighting the chemistry of cast-iron cookware.
Food sticks to pans because chemical bonds form between the food and the pan surface.

ALT Infographic on porphyria and its historic links with vampirism.
Many sources claim that porphyria, a rare group of disorders, inspired the vampire myth.
Porphyria is a group of genetic disorders.

ALT Infographic on swimwear fabrics and the effect that ultraviolet light and chlorine have on them. Swimwear is commonly made from synthetic polymers, particularly nylon and polyesters. Elastane (spandex) can also be blended with these fibers to add elasticity. Ultraviolet light from the sun can damage swimwear fibers; UV absorbers can prevent this. Chlorine can also damage swimwear materials. Rinsing swimwear in cold water and allowing it to dry in the shade can minimize the damage.

ALT The first column of the infographic explains that ultraviolet radiation is emitted by the sun along with visible light. Exposure to UV is what causes skin to tan and burn. UVC light is absorbed by the atmosphere, but longer-wavelength UVB and UVA light can penetrate the skin and damage DNA. This damage can ultimately lead to skin cancer, but some exposure to UV light is important for our skin to make vitamin D.

The second column of the infographic explains that when our skin is exposed to UV light, melanocytes, cells in the skin's epidermis, produce melanin. Melanin is a protective, polymeric pigment that absorbs UV radiation and dissipates it as heat. Increased melanin is what gives the appearance of darker skin in some people.


ALT Sunscreen and coral reef damage