Most male fin and blue whales sing at around 17 to 18 hertz, which is too deep for humans to hear, but the 'lonely' whale communicates at 52 hertz. When more recordings were released in the nineties, Dr Watkins studied the 52 hertz whale more closely.
The average person needs to absorb just a small amount of iron each day to stay healthy (around 1 mg for adult males and 1.5 mg for menstruating females). To achieve this, however, we need to consume several times that amount. This is because our bodies absorb only a fraction of the iron contained in the foods we eat.
However, men 19 years of age and older need only 8 mg of iron each day, a modest amount compared to pregnant women, who require 27 mg of daily iron.The Office of Dietary Supplements advises getting your daily iron from the food you eat rather than supplements.ompared to adult women, men generally require less iron during the course of their lifetimes. Male and female infants between the ages of seven months to one year of age need 11 mg of iron each day, states the University of Maryland Medical Center, or UMMC.