The San Francisco-based company sold 180 million shares at $45 apiece on Thursday, and on Friday it never traded above that price, ending the day down 7.6% at $41.57 even as other stocks gained. The share slump reflects investor skepticism about the size of the ride-hailing market, Uber’s ability to execute on food and package delivery and its push into autonomous vehicles, said Ygal Arounian of Wedbush Securities. For more on Uber’s IPO, check out the Decrypted  podcast:

Uber must execute flawlessly over the next 12 to 18 months, and if it does a market value of $100 billion or more is possible, Arounian said.

What she created–using a grocery receipt of her own as reference–was a better receipt, with three distinct elements. But each individual item features a bar chart of its own, representing how expensive it was in relation to other items in the category. One specific limitation Lu discovered during the process was that the printer could not draw horizontal lines, which meant she had to use various visual tricks at the pixel level to create her bar charts, along with the tiny icons of bread, dairy, and meat that she designed, too.

The description of O’Neill’s presentation, though, could apply note for note to a talk that Amazon founder Jeff Bezos gave on May 9 in D.C., unveiling his spaceflight company Blue Origin’s design for a lunar lander and a longer-term vision of space habitats. Jeff Bezos was one of Gerard O’Neill’s students at Princeton in the mid-1980s. Before he was designing luxury hotels, Safdie had demonstrated, in his Habitat 67 project in Montreal, that megastructures could produce a human-scaled environment that ordinary people would flock to, and the Geisel is a monument to the memorability of public architecture and public institutions.

The books went into detail and since reading them I’ve felt confident writing scripts I needed to scratch an itch. I felt there should be two distinct parts to the bot, one script getting data then passing that data along to the other script for action. My question: In the spirit of generally yet ridiculously useful things like messaging middleware, what non-obvious tools and classes of tools would you suggest a hobbyist investigate that they otherwise may never encounter?

Even after an idea becomes sufficiently popular to survive in the world without a host, it’s still difficult for creators to escape them, because ideas bond to their hosts in the form of reputation, like a virus that lives in one’s body forever. Like an artist on an autogenerated Spotify playlist, my “thing” is interchangeable with a lot of other people’s “things” that would give my audience the same fix. Ideas are fascinators that sparkle and dangle in front of the creator, distracting an eager audience from the person behind the curtain.

This is the first time in human history our planet’s atmosphere has had more than 415ppm CO2. to data from the Mauna Loa Observatory in Hawaii, the concentration of CO2 in the atmosphere is over 415 parts per million (ppm), far higher than at any point in the last 800,000 years , since before the evolution of homo sapiens. “This is the first time in human history our planet’s atmosphere has had more than 415ppm CO2,” Holthaus said in a widely shared tweet.

What she created–using a grocery receipt of her own as reference–was a better receipt, with three distinct elements. But each individual item features a bar chart of its own, representing how expensive it was in relation to other items in the category. One specific limitation Lu discovered during the process was that the printer could not draw horizontal lines, which meant she had to use various visual tricks at the pixel level to create her bar charts, along with the tiny icons of bread, dairy, and meat that she designed, too.

By the numbers: From 2016 onwards, per PitchBook, Uber raised $15.35 billion at $48.77 per share; it then raised another $8.6 billion in its IPO on Thursday at the slightly lower price of $45 per share. Those numbers dwarf the $5.6 billion that Uber raised before 2016. As of the close of trade on Friday, the market has now spoken: Uber shares are actually worth $41.57.

The complexity of our systems means they are not easily decomposable; it is rare that modern systems can be broken down to a single service running on a single host, for example. If I have even a superficial grasp of the law of requisite variety, I believe I could say that our systems do not obey it. What people have internalized during their careers, what they’ve learned about the organizations they work within, and how they’ve adapted as the systems they operate have changed requires dedicated effort.

Argo is dependent on a few things to make its magic happen: Cloudflare’s network, up-to-the-second performance data on how traffic is moving on the Internet, and machine learning routing algorithms. A single Cloudflare data center may be peered with a dozen networks, connected to multiple Internet eXchanges (IXs), connected to multiple transit providers (e.g. Telia, GTT, etc), and now, connected to our own physical backbone. Transit selection requires logic in our inter-data center data plane (the components that actually move data across our network) to allow for differentiation between different providers and links available in each location.