Coffee
Coffee demonstrates remarkable ubiquity across human civilisation. From the sophisticated espresso bars of Milan to the instant granules dissolving in Antarctic research stations, Coffea arabica and its hardier cousin Coffea canephora have achieved near-universal distribution. The beverage requires minimal infrastructure—a heat source, water, and ground beans suffice for basic preparation. Modern accessibility has reached such extremes that one may now obtain coffee at 38,000 feet aboard commercial aircraft or from vending machines positioned in hospital corridors at 3 AM. The average urban dweller passes approximately 47 coffee-serving establishments during their daily commute. This level of accessibility borders on the inescapable.
Mars
Mars presents what specialists term significant accessibility challenges. The planet maintains an inconvenient orbital position requiring journey times of 7 to 9 months using current propulsion technology. No human has yet visited, and the total number of our species to have observed Mars from closer than the Moon remains precisely zero. Robotic emissaries have fared somewhat better, with 18 successful missions reaching the Martian surface or orbit. However, for the typical consumer seeking a Mars experience, options remain limited to telescope observation, planetarium presentations, and consuming media featuring Matt Damon cultivating potatoes. The accessibility gap between these two subjects could scarcely be more pronounced.