Sun tanning However, it operates not by inducing direct DNA damage, but by producing reactive oxygen species which damage DNA indirectly. UVA (see above) induces a cosmetic tan but little extra melanin protection against sun damage, sun burn, or cancer. Ultraviolet B (UVB) radiation is in the wavelength range 280 to 320 nm. Much of this band is blocked by the Earth's ozone layer, but some penetrates. UVB: A person's natural skin color affects their reaction to exposure to the sun. An individual's natural skin color can vary from a dark brown to a nearly colorless pigmentation, which may appear white .
Why Does the Sun Shine? (The Sun Is a Mass of Incandescent Gas) Why Does the Sun Shine? (The Sun Is a Mass of Incandescent Gas) Why Does the Sun Shine? (The Sun Is a Mass of Incandescent Gas) is an EP by alternative rock band They Might Be Giants, released in 1993. The EP is notable for being their first release with a full-band lineup, rather than only the two original members (John Flansburgh and John Linnell) performing. It was also released as a single on 7" vinyl. All of the songs on the EP are cover versions, except for one. The title song is a cover of a song by Hy