Nell Greenfield Boyce

The company even sells T-shirts that say Occupy Mars.

But now on his social media company X, Musk has posted a message saying that the focus of SpaceX is a self-growing city on the moon, that this could be accomplished much faster than a city on Mars.

The move comes as SpaceX is competing with Jeff Bezos' company Blue Origin,

to build the lunar lander that NASA needs to return astronauts to the surface of the moon.

Nell Greenfield-Boyce, NPR News.

When SpaceX was founded over two decades ago, Elon Musk said its goal was to make humanity a multi-planetary species by bringing down the cost of space launches so that people could realistically get to Mars.

Since then, Musk has constantly talked about the red planet.

The company even sells T-shirts that say Occupy Mars.

But now on his social media company X, Musk has posted a message saying that the focus of SpaceX is a self-growing city on the moon, that this could be accomplished much faster than a city on Mars.

The move comes as SpaceX is competing with Jeff Bezos' company Blue Origin,

to build the lunar lander that NASA needs to return astronauts to the surface of the moon.

Nell Greenfield-Boyce, NPR News.

When raw slabs of quartz material get cut to fit kitchens, many businesses don't adequately control the hazardous silica dust that can be released.

Rebecca Schult is a lawyer for Minnesota-based Cambria, the major U.S.

manufacturer of the raw slabs.

In a hearing on Capitol Hill, she asked for a ban on lawsuits against manufacturers and distributors of Ross Labs.

But David Michaels, a former director of the safety agency OSHA, said these companies should take responsibility for the products they sell.

Nell Greenfield-Boyce, NPR News.

When raw slabs of quartz material get cut to fit kitchens, many businesses don't adequately control the hazardous silica dust that can be released.

Rebecca Schult is a lawyer for Minnesota-based Cambria.