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Author Question: Sally and Beth are playing together, both taking toys from the same toy box. Sometimes they hand ... (Read 28 times) |
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
There are more nerve cells in one human brain than there are stars in the Milky Way.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.