Elon Musk is incredibly ambitious about chipmaking and the Terafab project on @theXtakeover : “I still have a tremendous amount to learn about chipmaking. To be clear, I do not know how to make chips. I have no idea how to make them, but we will figure it out. You have to start somewhere. I did not know how to make cars or rockets either.”🤣

Elon would tell you to find the bottleneck and attack it relentlessly. What @ZachBDell learned from working with people who worked closely with Elon: “I've learned a lot of this from Antonio Gracias who's on my board and has worked very closely with Elon for decades. Every conversation with Antonio was the same: "Hey Antonio how's it going? "Zach what's your constraint? What's the constraint of the business? And I would just answer the question and that's all we would talk about. What's the constraint? What's the constraint? What's the constraint? Let's just focus all of our time and energy on that. It forces you to focus on the uncomfortable thing. We need to be constantly asking what is constraining us towards our mission? Let's just focus on that. It's incredibly clarifying and uncomfortable. The natural tendency is to talk about all the different things that are going on and all the different opportunities available to you. And the hard thing is to focus on the most important thing, the constraint in-between you and your goal. What constraints can we relieve? That’s really the only thing that matters and all the other stuff is just noise.”

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.

Mars is about 62,000× wider than the International Space Station. Yet in this photo, taken by Tom Glenn in 2020, the ISS appears larger. Here’s why: - The ISS is 109 m across but only ~400 km above Earth, giving it an angular size of roughly 50 arcseconds. - Mars is 6,800 km wide, but was about 62 million km away, giving it an angular size of only ~22 arcseconds. So despite being vastly smaller, the nearby ISS looked larger in the sky. Capturing this photo was not easy: the transit was visible only along a strip of land about 90 meters wide, with the ISS silhouette sweeping across at an equivalent ground speed of 7.4 km/s. Tom Glenn had to be in exactly the right place, point his telescope in exactly the right direction, and nail the timing to a fraction of a millisecond. The final image was extracted from a video frame with an exposure of just 0.00035 seconds.