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Stories from July 31, 2019
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1. Filling hospitals with art reduces patient stress, anxiety and pain (designweek.co.uk)
502 points by rchaudhary on July 31, 2019 | hide | 143 comments
2. LightSail 2 Spacecraft Successfully Demonstrates Flight by Light (planetary.org)
640 points by spazz on July 31, 2019 | hide | 144 comments
3. Math Basics for Computer Science and Machine Learning [pdf] (upenn.edu)
883 points by oldgun on July 30, 2019 | hide | 118 comments
4. A Raspberry Pi-powered live train station sign (balena.io)
642 points by chrisys on July 31, 2019 | hide | 141 comments
5. Equifax removed the $125 claim payout option after millions submitted claims (twitter.com/laurasullivanpr)
600 points by pavel_lishin on July 31, 2019 | hide | 441 comments
6. Advertising Is a Cancer on Society (jacek.zlydach.pl)
692 points by TeMPOraL on July 31, 2019 | hide | 640 comments
7. A Brief Guide to a Few Algebraic Structures (argumatronic.com)
266 points by edgarvm on July 31, 2019 | hide | 47 comments
8. A Look at Overnight Stays at US National Parks (jordan-vincent.com)
318 points by skilled on July 30, 2019 | hide | 98 comments
9. Tree planting: Where can I do it and which type is best? (bbc.co.uk)
302 points by pmoriarty on July 31, 2019 | hide | 210 comments
10. A $5,600 Electric Makeover for Old Diesel Cars (bloomberg.com)
254 points by rihegher on July 31, 2019 | hide | 195 comments
11. Kriegspiel (wikipedia.org)
291 points by tosh on July 31, 2019 | hide | 88 comments
12. As crime dries up, Japan’s police hunt for things to do (2017) (economist.com)
201 points by tareqak on July 31, 2019 | hide | 336 comments
13. Stop Blaming America’s Poor for Their Poverty (bloomberg.com)
300 points by stablemap on July 30, 2019 | hide | 366 comments
14. Implement mechanism to wait on any of several futexes (lkml.org)
244 points by yankcrime on July 31, 2019 | hide | 154 comments
15. An F-22 Raptor’s Crumbling Radar Absorbent Skin (thedrive.com)
194 points by Alupis on July 31, 2019 | hide | 238 comments
16. TSMC Talks 7nm, 5nm, Yield, and Next-Gen 5G and HPC Packaging (wikichip.org)
176 points by rbanffy on July 31, 2019 | hide | 77 comments
17. Web Scraping and Crawling Are Perfectly Legal, Right? (2017) (benbernardblog.com)
204 points by heshiebee on July 30, 2019 | hide | 125 comments
18. Amazon as experiment (ben-evans.com)
185 points by notlukesky on July 30, 2019 | hide | 65 comments
19. Introduction to Bayesian Filter (leimao.github.io)
167 points by keyboardman on July 30, 2019 | hide | 7 comments
20. DSVPN – VPN using TCP at port 80 and 443 (github.com/jedisct1)
195 points by northfoxz on July 31, 2019 | hide | 110 comments
21. Launch HN: Hatchways (YC S19) – Internships Instead of Interviews
267 points by jaclynmling on July 31, 2019 | hide | 81 comments
22. Elementary Algebra (1971) [pdf] (softwarepreservation.org)
127 points by tosh on July 30, 2019 | hide | 4 comments
23. Graph database reinvented: Dgraph gets $11.5M to pursue unique, opinionated path (zdnet.com)
189 points by bryanrasmussen on July 31, 2019 | hide | 93 comments
24. Amazon, Walmart, Ikea targeted in University of California light bulb lawsuits (reuters.com)
131 points by hhs on July 30, 2019 | hide | 95 comments
25. The Moon is older than previously believed (phys.org)
123 points by dnetesn on July 30, 2019 | hide | 21 comments
26. Building Payments for an Insurance Startup (moderntreasury.com)
133 points by saarons on July 31, 2019 | hide | 36 comments
27. First Programmable Memristor Computer (ieee.org)
95 points by headalgorithm on July 31, 2019 | hide | 34 comments
28. Marvin Minsky and the Ultimate Tinker Toy (tinlizzie.org)
93 points by mpweiher on July 31, 2019 | hide | 4 comments
29. The Origin of Most Coal on Earth (2016) (nationalgeographic.com)
111 points by lordnacho on July 30, 2019 | hide | 66 comments
30. Espresso Machine Powered by Tcl/Tk (groups.google.com)
136 points by blacksqr on July 31, 2019 | hide | 43 comments

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