Although the underlying physics of phenomena that we can observe on Earth has been worked out to a good-enough level, the details of understanding how to use that physics is still far from solved - it is very easy to find things like bicycles, chaotic flow and the like that range from very difficult to too difficult with our current tools.
The process of achieving Latin proficiency was a combination of brutal hazing ordeal, practical training, initiation rite, and bonding experience. It was vaguely like Marine boot camp on Parris Island, only several years longer in duration. The male youth of some Amerindian tribes were required to dangle unflinching for long periods from flesh-hooks piercing their breasts before being admitted to the hunt. Today we are told, certain gangs of criminal youths require their candidates for admission to commit a murder. Such was the general vibe among Latin-learners. When they emerged proficient they were members of a select guild, an “in” group. The ability to toss off a Latin bon mot made you one of the chaps. In the 1840s a British military commander in India, Charles James Napier, is alleged to have informed his superiors of his successful pacification of the region of Sind with a one-word message: “Peccavi.”** You had to be one of the chaps to get it, but then they were all chaps, the battle of Waterloo having been won, after all, on the playing fields of Eton.
PIXL: The Planetary Instrument for X-ray Lithochemistry: This X-ray fluorescence spectrometer will enable high resolution analysis of soil samples. The Mars 2020 mission will also package and cache the soil samples it collects for a later potential sample return mission.
RIMFAX: The Radar Imager for Mars' subsurFAce eXperiment generates powerful ground-penetrating radar that will probe below the rover to a depth of several dozen meters.
MEDA: The Mars Environmental Dynamic Analyzer, this instrument package will provide extensive meteorological measurements, including wind direction, speed, temperature, pressure, humidity, and dust particle shape and size during dust storms.
MOXIE: The Mars Oxygen ISRU Experiment (yes, an acronym containing acronyms!) will test the ability for future astronauts to "live off the land," producing oxygen from carbon dioxide drawn from the tenuous Martian atmosphere.
SHERLOC: The Scanning for Habitable Environments with Raman and Luminescence for Organics and Chemicals. This is the potential "life-finder," which will utilize fine scale UV-imaging in the search for organic compounds.
SuperCam: This instrument will image and analyze the chemical composition of the surrounding terrain, as well as detect the presence of organic compounds in rocks and regolith from a distance.
A new and improved stereoscopic imaging system known as Mastcam-Z will also scan the terrain around the rover in high-definition detail. Though previous rovers weren't meant to scan the skies, they've proven to be serendipitous Martian astronomers as well, nabbing images of the fleeting Martian moons.