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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

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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.

Play in Four Cultures Across cultures, play is the most common activity in early childhood. Source: Play in Four Cultures Across cultures, play is the most common activity in early childhood. Source:
In middle childhood, children are increasingly able to understand other people’s thoughts, ... In middle childhood, children are increasingly able to understand other people’s thoughts, ...
The neural pathway responsible for the production and learning of song in the male canary. The neural pathway responsible for the production and learning of song in the male canary.
Childhood Amnesia Childhood Amnesia
Number Facts Number Facts
Acanthostega, Early Amphibian Acanthostega, Early Amphibian
Video: Requirements for nervous signals

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