DR. FOURNIER D'ALBE'S book is chiefly a history of the optophone, the instrument for enabling the blind to read ordinary print. This history claims about one-third of the volume and deals in ...

Selenium is a mineral found in the soil. It naturally appears in water and some foods. While people only need a very small amount, selenium plays a key role in your metabolism. Brazil nuts are are one ...

Selenium is vital for the thyroid gland and immune system. A deficiency can cause tiredness, hair loss, recurring sickness, muscle weakness, and brain fog. Eating selenium-rich foods such as Brazil ...