An "impossible object" is a three-dimensional figure that cannot exist in real life due to conflicting perspectives or geometric properties. These objects often appear to be plausible at first glance but reveal contradictions upon closer inspection. A well-known example is the Penrose triangle, which seems to form a continuous loop but cannot be constructed in three-dimensional space. Artists and mathematicians often explore impossible objects to challenge perceptions of reality and perspective. They are frequently used in visual art, such as in the works of M.C. Escher, who created intricate designs that play with the viewer's understanding of space and form.