A few weeks after our newborns arrived, I kept worrying about getting their bath water temperature right, since newborn skin is so much more sensitive. So I used it as an opportunity to test Grok 4.6 and built a tiny Apple Watch app that checks the water temperature and tells me when it’s too hot or cold. Grok Bot was also surprisingly useful for shipping it: it navigated the App Store submission process through the browser, helped fill out the forms, and even helped answer Apple’s questions during review. It’s now on the App Store. If anyone wants to try it, I’d love feedback. apps.apple.com/us/app/baby-b…

Grok Imagine one-shots the Battle of Red Cliffs (赤壁之戰), the famous epic Chinese battle in 208 AD.

I just used instinct and stripe link to buy my niece a hot pink piano… entirely from the messaging interface 🤯🤯 Instinct was even kind enough to find me a 15% off discount!!!!

Making cost to orbit and then space will unlock infinite growth for humanity.

St. Augustine: “Remove justice, and what are kingdoms but gangs of criminals on a large scale? What are criminal gangs but petty kingdoms? A gang is a group of men under command of a leader, bound by a compact of association, in which the plunder is divided according to an agreed convention… For it was a witty and a truthful rejoinder which was given by a captured pirate to Alexander the Great. The king asked the fellow, ‘What is your idea, in infesting the sea?’ And the pirate answered, with uninhibited insolence, ‘The same as yours, in infesting the earth! But because I do it with a tiny craft, I'm called a pirate: because you have a mighty navy, you're called an emperor.’” (City of God, Book IV, Chapter 4)

What do you call racism against Blacks? —> Racism. What do you call racism against Whites? —> DEI.

Told Grok to add subtitles. Done in seconds. Might not need Photoshop or CapCut anymore👀✨️

I had a life before and after Grok Bot. Mamma mia. This is life changing. Meet Cosie, my Chief of Staff

Falcon Heavy's two side boosters land at LZ-2 and LZ-40

Regret the tone of my post on data centers yesterday. What I should have said: There were reasonable concerns about data centers 18ish months ago: water, taxes, jobs, electricity prices, the environment and what they would do to small towns. Well-structured data center projects have largely addressed these concerns today and we should be celebrating this. On balance, data centers are awesome for America in every way. On water: U.S. data centers use a fraction of what golf courses use. A lot of the numbers from 18 months ago were off by over 1000x. Newer data centers use closed-loop systems or recycled water. Should be required by every town approving a data center project. On taxes: looking only at sales-tax exemptions, as Ronan Farrow did, is the wrong way to evaluate this. Data centers pay significant property taxes. Loudoun County, which is the wealthiest county in America, now collects on the order of $1 billion a year from data centers. In Quincy, WA, data centers are more than half the property-tax roll. Over time, property taxes can go to zero while government spending increases in these towns. On jobs: this has been unambiguously awesome for blue collar Americans. Demand for electricians, plumbers, welders, HVAC techs, and contractors has gone vertical, and it is not a one-time construction job. These buildings get upgraded and expanded over time. That is why the building trades are fighting for them, and why some unions are now treating opposition to data centers as a reason not to endorse politicians. On power: the original fear was that households would pay for the incremental electricity demand in the form of higher prices. That is why the ratepayer-protection deals and the new large-load tariffs exist. The right structure is: the data center brings or pays for new generation and signs a contract long enough that existing customers are protected. Where that is happening, utilities are cutting or freezing residential rates and saying so on the record. Where it is not, people are right to object. Electricity prices are going down *today* in a number of large states because of data centers. 
On the environment: data centers overwhelming use natural gas today, which is the cleanest power source outside of nuclear, solar and wind. And the companies that are building the data centers are committed to carbon neutrality such that an equivalent amount of solar will likely be built. Maybe more importantly, the data centers need batteries to function effectively and these batteries can also sell energy back into the grid (which recently prevented blackouts in Texas). Over time, data centers will run on solar plus batteries. On the towns: Poverty in Quincy, WA fell from 29% to 6%. Data center taxes paid for a new high school, a hospital, a library, police and fire stations. This is happening in many left for dead former mill and farm towns that had no other bidder for the land. Data centers are actually reindustrializing parts of America and creating the kind of working-class jobs both parties have spent decades claiming to support. That should not be a partisan issue. Data centers can and should be awesome for America and they increasingly, overwhelmingly are. Supporting the outsourcing of data centers to China will likely age just as well as support for the outsourcing of high quality, blue collar manufacturing jobs to China has aged. When the facts change, I change my mind. I hope that reasonable people who had good faith reasons to oppose data centers at least consider updating their beliefs given the change in the facts over the last 18 months. This really matters for America. I will say I also think the idea of making data centers beautiful is a good one that has yet to be implemented. Data centers should be just as beautiful as Grand Central Station. We can learn a lot from the railroad buildout. Neoclassical revival ftw. Might write up open-weight AI tomorrow as this is equally essential to America.

More from today's Falcon Heavy launch

Falcon Heavy launches @NASA’s Nancy Grace Roman Space Telescope from pad 39A in Florida, beginning its more than three-month journey to its destination where it will generate never-before-seen photos of the universe

Should say that I personally still find the @Grok app more useful for some tasks than @Bot. Worth trying it out on super tough tasks if you haven’t in a while. apps.apple.com/app/id6670324…