Why does mars have polar ice caps?

Answer 1

"clouds of dry ice (frozen CO2) and water ice crystals (H2O) drift through the martian atmosphere carried by the martian winds."

OK, no offense meant but this above quoted answer doesn't even come close...I am still researching this (I'm an MD interested in alternative science). The short answer is that outside-the-box theorist and free thinkers tend to say YES..there are now publicly available photos showing what clearly looks like snow/ice covered caps at the poles. (see work of astronomer Tom Van Flandern). Mainstream acknowledged info (ie. NASA sanctioned) now leans toward the idea the water ONCE existed on Mars but claims that water is now completely gone from the Mar's surface- leaving those compelling pole photos entirely unaddressed. PLEASE, keep critically thinking for yourselves. Investigate.

Answer 2

Mars has polar ice caps because its polar regions experience very cold temperatures, causing water vapor in the atmosphere to condense and freeze as ice. The ice caps on Mars are primarily made up of water ice, along with some frozen carbon dioxide. The ice caps play a role in regulating the planet's climate and hold clues about the history of water on Mars.