1. On average, scalp has 100,000 hairs. Redheads have the least hairs – 85,000; blondes are the richest with 130,000; brown and black haired people have about 100,000.
2. 90% of scalp hairs are growing and other 10% are resting.
3. Loosing 100 hairs per day from the scalp is normal.
4. Male hair grows faster than female hair.
5. Combing is less damaging than brushing.

The ancient Egyptians were the first to use urine to determine pregnancy. To this end they moistened the wheat seeds with urine, and the germination was the equivalent of today’s two stripes (or a plus sign). Testing of this theory in 1960s proved that the urine of pregnant women did indeed promote growth most of the times.

In the 1890s the scientists suggested that certain organs of human body secrete fluids that influence the workings of a human. English physiologist Ernest Henry Starling named these fluids "hormones", after the Greek word hormon meaning "that which sets in motion".

However, the hormone that can be found in a pregnant woman's urine and blood and is detected by today’s pregnancy tests was discovered only in the 1920s by German scientists. Selmar Aschheim and Bernhard Zondek introduced testing which identified the presence of hCG in urine in 1928. To test for pregnancy they injected an immature female mouse with woman’s urine. In the case of pregnancy, the mouse’s ovary would show an estrous reaction (be in heat) despite its immaturity.

The first fully-documented human blood transfusion was performed by Dr. Jean-Baptiste Denys in 1667. He transfused the blood of a sheep to a boy, who later died. Denys was accused of murder, blood transfusions were prohibited in France for next 150 years.

In 1818, British obstetrician and surgeon James Blundell performed the first successful transfusion of human blood to his patient. He performed later 10 transfusions, 5 of which were successful, and invented various transfusion instruments.

In 1901 Austrian biologist and physician Karl Landsteiner developed the system of classification of blood groups for which he was given the Nobel Prize for Physiology or Medicine in 1930. This discovery explained why many previous transfusions were unsuccessful.

In 1914 Russian physician Vadim Yurevich and Belgian doctor Albert Hustin used sodium citrate as an anticoagulant thus opening the way for blood banks.

In the 1980s and 90s people become really concerned over the skin cancer. It resulted from all the cheap package holidays to Mediterranean destinations that were so popular in the 1970s.

The sun’s energy travels to the Earth via ultraviolet radiation. It comes in three types: UVA, the longest rays, which penetrate deeper into your skin; UVB, the shorter rays that cause sunburns and UVC, the most dangerous rays that are fortunately completely absorbed by the Earth’s upper atmosphere.

The sun is responsible for the skin cancer. Yet the recent studies have found that sunlight may reduce risks of some forms of cancer, such as stomach, breast and prostate.

The sun is our main source of vitamin D which strengthens our bones and muscles, and enhances the immune system. But we only need ten minutes to get the necessary Vitamin D benefits from sunlight, which we receive even if we are wearing SPF. Salmon is also a source of vitamin D.

Botox® is made from "botulinum toxin type A", a poison produced by the bacterium Clostridium botulinum, which causes botulism, a severe form of food poisoning.

Botox is injected into the muscles used in frowning and raising the eyebrows to paralyze them and thus smooth out the wrinkles. The botulinum toxin is eventually metabolised by the body after three to four months, and many prefer to repeat the injection once in a while in order to maintain a wrinkle-free look.

In the US Botox is more popular than breast enhancement surgery. According to the American Society for Aesthetic Plastic Surgery (ASAPS), more than 1.6 million people received injections in 2001. In the UK 50 000 Botox injections were made in 2003.

Botox first began to be used in the 1980s to treat uncontrollable blinking (blepharospasm) and misaligned eyes (strabismus). Cosmetics treatments were pioneered by dermatological surgeons in 1987.