Where can the sculpture of Newton by Eduardo Paolozzi be found?

The sculpture of Newton by Eduardo Paolozzi is located at the British Library. This significant work of art is part of Paolozzi's interpretation of Sir Isaac Newton, reflecting the artist’s innovative style and his engagement with themes of science and culture. The British Library serves as a fitting backdrop for the sculpture, given its association with knowledge, literature, and enlightenment—pertinent themes that resonate with Newton's contributions to science.

The other locations mentioned do not host this specific piece. Tate Modern is known for contemporary and modern art, while the Natural History Museum focuses on natural history displays, and the National Gallery houses European paintings. Therefore, these options, although notable venues, are not relevant for this particular sculpture, highlighting why the British Library is indeed the correct answer.