It had long been suspected that the egg came first but now we have the scientific proof that shows that in fact the chicken came first, said Dr. Colin Freeman, from Sheffield University's Department of Engineering Materials, according to the Mail.
Best Answer: The sap should be stored at a temperature of 38 degrees F or colder, used within 7 days of collection and boiled prior to use to eliminate any possible bacteria growth.
Donât make the mistake of thinking you can tap now and process later â this will affect the taste and chemical properties of the Birch sap. Birch syrup on the other hand has a shelf life of around two years â but it takes about 130 â 150 gallons sap make to make one gallon syrup. (Source).