Impulse Mars lander
An illustration of a Mars lander, within its entry capsule, separating from its cruise stage upon arrival at Mars. Impulse Space would build the lander and Relativity Space would launch it.

Two startups, each yet to fly their first missions, said July 19 they are collaborating on a Mars lander mission they claim could launch as soon as 2024.

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Jeff Foust has more than a decade of experience writing about space policy, entrepreneurial ventures and regulatory affairs. In 2001, he established spacetoday.net to aggregate and summarize the day's space-related news stories. In 2003, he started The...