Anuj Sahai

Toothpaste needs 30 minutes to do its job. You rinse it off after 2. Your enamel is made of a mineral called hydroxyapatite. It dissolves whenever the pH in your mouth drops below 5.5, which happens every time you eat or drink anything acidic. Coffee, citrus, soda, bread, even the bacterial fermentation from last night's dinner. Calcium and phosphate ions leach out into your saliva. Your mouth is in active demineralization right now if you ate breakfast. Saliva pulls those minerals back over the next 30-60 minutes. That's normal repair. It rebuilds the same hydroxyapatite that just dissolved at pH 5.5. Fluoride changes the chemistry. When fluoride ions sit on the enamel surface during the rebuild window, they swap into the crystal lattice in place of a hydroxyl group. The new mineral is called fluorapatite. Critical pH drops from 5.5 to 4.5. Solubility is roughly 10x lower. The tooth that grows back is harder than the one that was there. Adult toothpaste sits at 1,450 ppm fluoride. The instant you rinse with water, salivary fluoride drops by roughly 2.5x. The 30-minute substitution window collapses to a few minutes. The active ingredient goes down the drain. The UK's official dental guidance is "spit, don't rinse." Pediatric dentistry researchers attribute up to 25% less decay to the habit change. Spit. Walk away. The chemistry runs without you.

Four years ago, I sat down with my 12-year-old daughter in the US and told her I was walking away from a successful tech career and real estate business to return to India for public service and politics. At that age, she didn’t realize “public life” would slowly take her Appa away from her for months… and years. But I came with conviction. So for the last 4 years, we gave everything we had — for example -In villages like Subramaniapuram and Vellanaikottai, we built bus shelters, restored a 100-acre pond, removed seemai karuvelam, strengthened bunds, planted thousands of palm saplings, supported students’ education, organized medical camps and career workshops, built community sheds, encouraged youth and sports activities, and contributed to annadanams. It cost several ten lakhs of hard-earned money - just for this village alone. But more than money, it cost time… family moments… and precious years watching my daughter grow up from far away. Then elections came. And the same village chose a candidate who had barely visited them in five years. In the end, one week of election-time money defeated four years of sincere service. Yesterday, my daughter quietly asked me over video call: “Appa… can you now tell me what exactly politics is?” For the first time in my life, I did not have an answer for my chellaponnu. @svembu

@SteelcaseAP Pathetic design. No number for customer care. On the underside of the table, wires keep dangling like some local shop cheap product. Trying to get this resolved for months. Pics attached

This is how the green cover in Bangalore reduced over the years. The city is baking .

There's a physicist at Stanford named Safi Bahcall who modeled this exact principle and the math is wild. He calls it "phase transitions in human networks." When you're stationary, your probability of a lucky event is limited to your existing surface area: the people you already know, the places you already go, the ideas you've already been exposed to. Your opportunity window is fixed. When you move, your collision rate with new nodes in a network increases nonlinearly. Double your movement (new conversations, new cities, new projects) and your probability of a serendipitous encounter doesn't double. It roughly quadruples. Because each new node connects you to their entire network, not just to them. Richard Wiseman ran a 10-year study at the University of Hertfordshire tracking self-described "lucky" and "unlucky" people. The single biggest differentiator wasn't IQ, education, or family money. Lucky people scored significantly higher on one trait: openness to experience. They talked to strangers more, varied their routines more, and said yes to invitations at nearly twice the rate. The "unlucky" group followed the same routes, ate at the same restaurants, and talked to the same 5 people. Their networks were closed loops. No new inputs, no new collisions. Luck isn't random. Luck is surface area. And surface area is a function of movement. The lobster emoji is doing more work than most people realize. Lobsters grow by shedding their shell when it gets too tight. The growth requires a period of total vulnerability. No protection, no armor, soft body exposed to the ocean. That's the cost of movement nobody posts about. You have to be uncomfortable first. The new shell only hardens after you've already moved.

On call with Airtel call center for 45+ mins now and the guy refuses to transfer the call to his supervisor and just keeps asking me to call back. Issue with international roaming and @airtelindia @Airtel_Presence does not care. Pathetic experience last 24 hours.

Last few days, some leaders of opposition played a very responsible and truly nationalist role. Honorable mentions include @ManishTewari @ShashiTharoor @OmarAbdullah @asadowaisi and so many others. Many might differ with their politics, criticise them, might not agree with what they represent, but that is part and parcel of democracy. They played a stellar role when it mattered the most and for that we must appreciate them.

J&K CM Omar Abdullah tweets, "What the hell just happened to the ceasefire? Explosions heard across Srinagar"

This is no ceasefire. The air defence units in the middle of Srinagar just opened up.

What the hell just happened to the ceasefire? Explosions heard across Srinagar!!!

The UK government today called on Pakistan to crack down on terror within its borders. timesofindia.indiatimes.com/world/uk/uk-go…

@east_bengaluru @DKShivakumar This needs to be made a model zone to showcase brand Bangalore Not just roads but parks, trees, develop the lake etc. pretty much like the CBD.

This 10 km stretch, responsible for over 60% of India’s software exports, should be the best—but it stands as a prime example of political extortion. It’s time to set things right! @DKShivakumar #BrandBengaluru #ORR #Bengaluru

@naveenmzs @DKShivakumar Awesome. Hope this accelerate the progress. Thank you @DKShivakumar please make one of the highest tax zones and host to thousands of visitors every month, a model for Bangalore and also basic comfort for Sakara patients @RisingBellandur

Days after residents protested against bad roads in the tech hub, Dy CM @DKShivakumar to visit Bellandur today at 4pm

@osd_cmkarnataka @PCMohanMP @Tejasvi_Surya @timesofindia

A week since our last peaceful protest, and the road remains in terrible condition. Bellandur roads need immediate repairs. @DKShivakumar @SakraHospital @bwssbchairman @BBMPofficial @PMOIndia @PTI_News #MantriEspana

#BellandurRising Where are our roads ??? #Bengaluru #bbmp

@PCMohanMP @ArvindLBJP @BBMPCOMM @BangaloreMirror @TimesNow @tv9kannada Citizens and hospital patients have suffered for way too long. It cannot be this hard to fix if you want to. #bellandurrising

#Bellandur #BBMP #roadsurface @PTI_News @TimesNow @republic @SakraHospital Terrible state of a crucial hospital road. Thanks to @bwssbchairman and #Larsen&Toubro who did the water works to dig up this road several months back, thousands of commuters suffer daily #mantriespana