#1 smart zodiac sign

 (Mendeleev)

Who is the smartest? Pisces are generally excellent students (I found 4 Valedictorians Pieces of 4 years of my university studies) 

Among the top 5 scientists with a high IQ: Pisces (Einstein, Copernicus) and Aquarius by 2 each. 

GOAT in chess Pieces Bobby Fischer 

GOAT in IT is Steve Jobs 

Inventions in surgery in top 10 is Pieces #1

The scientific element air definitely is (all 3 air). Libra among poets, astrologers (Stephen Arroyo) and chemists (Nobel), Aquarians are at once the best in chemistry, biology, physics, writers as well as inventors. The twins are economists, architects, one of the strongest chess players and biologists. Sagittarius is the smartest among schoolchildren. Earthly Taurus, Capricorn and Virgo (cool mathematicians, Virgo is also the best among chemists after Aquarius and the number 1 writer)

Taurus is one of the best in poetry and “What? Where? When?" (together with Scorpio)

Scorpio is the best in chess, and in “What? Where? When? also number 1

Aries could be among the worst, if not the 2nd place in mathematics after Taurus. Capricorn could also be among the worst if not the 3rd place in "What, Where, When?" and among the leaders in physics.

Remaining among the worst: Cancers, Leo

Best: Aquarius