When they write that the name of the hero who accomplished a heroic deed is unknown they usually mean a woman.
And God said, Let us make man in our image, after our likeness (Genesis 1:26). As you can see, the story of the creation of Homo sapiens is in the singular - "Let us make a man." Here THERE IS NO TALK about a man and a woman, but about the single containing male and female nature. However, later in the text, the singular suddenly becomes the plural: and let them have dominion over... (Genesis 1:26).
In every form, birch makes an excellent tonic and detoxifier, mainly working on the urinary system to remove waste products, such as kidney or bladder stones and gravel, gout, and rheumatism. It reduces fluid retention and swelling and clears up many skin problems. Birch is regarded as safe medicinally and no side effects have been reported.