Solomon was given much more than just a discerning heart. He was very familiar with a multitude of scientific information. He knew lots of "stuff".

Notice how many daily provisions were required for Solomon and his table. 30 head of cattle among many other things.

Many believe that the Queen of Sheba took back much more than just monetary gifts from King Solomon. A few months after her return she gave birth to a son.

2 Chr 9:12
King Solomon gave the queen of Sheba all she desired and asked for; he gave her more than she had brought to him. Then she left and returned with her retinue to her own country.