I asked Grok:

When will humans first land on Mars?

Answer:
The timeline for humans first landing on Mars depends on various factors including technological advancements, funding, and international collaboration. As of my last update, here are some key points:

NASA's Artemis Program: NASA aims to return humans to the Moon by the late 2020s through its Artemis program, with Mars as the next major target. The current planning suggests a human mission to Mars could potentially happen in the 2030s or 2040s, but this is speculative and subject to change based on funding and technological developments.
SpaceX's Plans: Elon Musk's SpaceX has set more ambitious timelines, with Musk previously mentioning goals for human missions to Mars in the 2020s or early 2030s. However, these are aspirational targets and depend heavily on the success of their Starship rocket, which is still in development.
International Efforts: Other countries like China have also expressed interest in Mars missions, potentially in the 2030s or beyond, though detailed plans are less public.

Given these considerations, while there's no definitive date, the range often discussed for a human landing on Mars spans from the late 2030s to the 2040s. However, this could shift based on technological breakthroughs or setbacks.