SpaceX's bold Mars vision faces scientific doubts. Experts highlight engineering challenges and human biology unknowns. Colonizing Mars presents immense hurdles. Musk's ambitious timelines are questioned.

A single stock market debut has done what once seemed unimaginable: create the world's first trillionaire. Elon Musk's fortune surged beyond $1.1 trillion (£820 billion) after SpaceX launched what is expected to be the biggest IPO in history,

SpaceX incentivizes Musk to create a million-person colony on Mars. But in his lifetime, that’s not realistic.

Elon Musk, the world's richest man and now first-ever trillionaire, controls a lot of different businesses.

Elon Musk's latest SpaceX compensation plan is attracting attention because it appears to head off another years-long shareholder fight like the one that turned his Tesla pay package into a legal saga.

Elon Musk and SpaceX seemingly have an incredible Mars mission on the horizon.

Former NASA CTO Chris Kemp joins CNBC's 'Squawk on the Street' to discuss SpaceX as Elon Musk's company made its market debut Monday.

Reading time 4 minutes U.S. oligarch Elon Musk became the world’s first trillionaire on Friday after his company SpaceX went public in the largest initial public offering ever. Musk is worth $1.1 trillion,