Bio

the "Frame Rate" of the eye is often considered to be around 30 frames per second

sex of a fetus is predetermined by the chromosomes in the sperm cell

  • The egg cell is always X. The sperm cell will be either X or Y. When combined, the cells become either XX (female) or XY (male) and thus the cells continue to grow into a male or female human.

Acclimatization

Humans acclimatize faster in response to heat, but slower in the cold.

  • Acclimatization usually occurs over a period of about two weeks in healthy, normal persons

Lean people tolerate heat better than obese people. The more obese a person is, the less skin surface area the person has in relation to his or her weight. Greater surface area provides more exposed skin to perspire and cool the body through evaporation.

  • But this same fat can be beneficial to a person who lives in cold climates because the fat insulates skin tissue. The Inuit, who live in cold regions, tend to have more body fat than people who live in warmer climates.

Children
  1. Brain
  2. Genes
  3. Proteins