Vishniac is the larger crater of the Martian surface feature called the Giant's Footprint.

It was named after Wolf V. Vishniac, a microbiologist who died on an expedition to Antarctica.

Professor Carl Sagan felt very bad for the scientist, and so found an unnamed crater at the exact longitude and latitude that he died on Mars and named it after him.

[2] The crater measures approximately 80.47 kilometres (50 mi) in diameter.

This article about an impact crater on Mars or its moons is a stub.