Ayan Banerjee

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Ayan Banerjee

Ayan Banerjee

@ayanban7

Professionally passionate, believe in the boundary-lessness of creativity, and love to flit between a high-tech optics research lab and a theatre stage!!

Kolkata, India 가입일 Mart 2013
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Ayan Banerjee
Ayan Banerjee@ayanban7·
This is the Real President of the United States of America speaking.
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Ayan Banerjee
Ayan Banerjee@ayanban7·
And there are little people who claim now that basic research is useless!
arin@ArinVerma1910

In 1905, Einstein published special relativity. In 1915, he published general relativity. Einstein was just trying to understand the universe. But without Einstein's math, Google Maps would be wrong by 11 kms every single day. Let me tell you why - this is very interesting :)) Your phone doesn't "talk" to GPS satellites. It only listens. Each satellite is broadcasting one thing, constantly: "I am satellite 'A', and it is currently 14:23:00.000000." Your phone receives signals from 4 satellites simultaneously. Because light travels at a known speed, tiny differences in arrival time tell it exactly how far it is from each satellite. 'A' satellite tells you: you're somewhere on a sphere of radius 20,000 km. 'B' satellite: that sphere intersects another sphere - now you're on a circle. 'C' satellite: that circle intersects a third sphere - now you're at 2 points. 'D' satellite: eliminates the last ambiguity and only one point remains. That's you! Except there's a problem nobody thought about until Einstein. The satellites are orbiting at 20,200 km altitude, moving at 14,000 km/h. Two things happen to their clocks simultaneously: - Special relativity: Moving clocks tick slower. At orbital velocity, the satellite clock loses 7.2 microseconds per day - General relativity: Clocks in weaker gravity tick faster. At that altitude, gravity is weaker. The clock gains 45.9 microseconds per day. Net effect: 45.9 - 7.2 = +38.7 microseconds per day. In 38.7 microseconds, light travels 11.6 kilometers. So without correction, the system would accumulate 11.6 km of error. Every single day. In a week, your navigation is useless. The fix is one of the most elegant things in all of engineering. Before each satellite launches, its atomic clock is physically tuned to tick slightly slower than it would on Earth - by exactly 38.7 microseconds per day. Once in orbit, relativistic effects speed it back up. And it arrives at exactly the right rate. Einstein's 1915 paper is baked into the hardware of your phone's navigation system. The next time Google Maps routes you correctly, you're experiencing general relativity. You just didn't know it.

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Ayan Banerjee
Ayan Banerjee@ayanban7·
Clearly enunciated by @tjoseph0010.
🥇 Pragnya Gupta@GuptaPragnya

Genes Don’t Lie. Brahmins Carry the Steppe Migration in Their DNA. Read Devdutt Patnaik —- ——————————— When they tell you Aryan Migration Theory (AMT) has been debunked... show them this little genetic fact....genes do not lie ... Brahmins in India possess significant Steppe ancestry, generally averaging 15–30%, primarily inherited via male ancestors (~60% frequency of Y-DNA R1a) who migrated from the Eurasian Steppe during the Bronze Age. This Steppe component, linked to Indo-Aryan speakers (Sintashta/Andronovo), is generally higher in North Indian and North-West Brahmins compared to Southern communities. Key Aspects of Steppe Genes in Brahmins: Admixture Percentages: North Indian Brahmins (e.g., UP, Bengal) can have up to 30% Steppe ancestry, while South Indian Brahmins often show lower levels, around 11-20%. Paternal Lineages: The R1a-Z93 haplogroup is the dominant (over 60% in some groups) Y-DNA link to the Bronze Age Steppe warriors, often identified as part of the Sintashta-Andronovo culture. Comparison with Other Groups: While high, Steppe ancestry in Brahmins is not the highest in India; groups like the Rors, Jats, and Kalash show higher percentages, sometimes exceeding 50%. Maternal Lineages: Steppe ancestry is primarily inherited through males; it is very rare in the maternal mitochondrial DNA of Indian populations. Distribution: Studies show a correlation between high Steppe DNA and traditionally priestly/upper-caste statuses, representing a "collision" that occurred roughly 3,500–4,000 years ago. Regional Variation: North/Northwest: Kashmiri Brahmins are often cited among groups with higher Steppe ancestry, matching their position on the northwestern migration route. South: South Indian Brahmin communities have lower, but still significant, levels, showing more admixture with local Dravidian-speaking populations compared to their northern counterparts. this information was discovered after 2010...but Brahmins are actively suppressing it... they keep talking about Harappa gene of 2000 BC and not gene entry that happened after Harappa in 1500 BC.... cunning Brahmins @devduttmyth

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Ayan Banerjee
Ayan Banerjee@ayanban7·
Mothers and their children! Utterly entangled! @Abhadra7
Anish Moonka@anishmoonka

You have your mother's cells in your brain right now. If she ever carried you, yours are in hers. Scientists looked at the brains of 59 women after they died, ages 32 to 101. In 63% of them, they found their sons' DNA scattered across different brain regions. The cells had traveled from the womb, through the blood, past the wall that normally keeps foreign material out of the brain, and settled in. The oldest woman still carrying her son's cells in her brain was 94. In mice, those cells became functional brain cells. The transfer starts as early as 7 weeks into pregnancy. Your cells slip through the placenta into your mother's body. Hers slips into yours. One study found a mother still had her son's cells in her blood 27 years after giving birth. After delivery, between 50 and 75% of women carry their child's cells. During pregnancy, up to 6% of a woman's blood DNA comes from the baby. When a mother's heart gets damaged during or after pregnancy, the baby's cells travel to the injury, latch on, and turn into beating heart cells, blood vessel lining, and muscle. Heart failure tied to pregnancy has a 50% spontaneous recovery rate, better than every other kind. The Mount Sinai team behind the research thinks the baby's cells are fixing the mother's heart from the inside. The cancer data caught me off guard. A study compared healthy women to women with breast cancer. 85% of the healthy group still carried their children's cells. Only 64% of the breast cancer group did. That works out to about 4x lower odds of getting breast cancer if you kept those cells. The working theory is that they patrol the body and catch cancer cells before they grow. A 2022 study found that in developing mouse brains, a mother's cells controlled the brain's immune cells, preventing them from cutting too many connections between brain cells. Your mom's cells helped wire your brain before you were born. And it stacks across generations. A woman can carry cells from her kids, from her own mother, and even from pregnancies her mother had before her. Three generations of cells from different people, living inside one body.

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Ayan Banerjee
Ayan Banerjee@ayanban7·
Interesting! I talked with Zahavi when he came to IISER Kolkata at the invitation of @Abhadra7. Fantastic theory it is - the Handicap Principle. Wonder, though, what he would have about the present situation, and the video going viral!
Anish Moonka@anishmoonka

Went down the rabbit hole on this. Crows can recognize your face, hold a grudge for years, and warn other crows to avoid you. The thousands in Tel Aviv right now are running a nightly operation that puts most logistics companies to shame. Every evening from fall through early spring, crows worldwide gather in massive groups to sleep together. It's called communal roosting. In 1973, a biologist at Tel Aviv University named Amotz Zahavi figured out why. His theory: the roost works like a group chat. Crows that found food during the day show up well-fed. Crows that didn't eat watch who looks healthy, then follow them the next morning to wherever the food is. The flock is a nightly information exchange. A crow has about 1.5 billion brain cells. That's roughly the same as some monkeys. The cells are just smaller and packed closer together, which may actually make them faster. In lab tests using the same setup for both animals, crows and monkeys held the same number of items in short-term memory: about four. Crows bend wire into hooks to reach food. They teach each other which individual humans are dangerous. In 2024, German researchers taught them to count aloud, using different calls for different numbers. A 2020 study in Science found crows are aware of what they're seeing and can think about it before acting. Until that paper, only humans and monkeys had shown that ability. Israel sits on one of the planet's busiest bird highways. About 500 million birds from 550 species pass through Israeli airspace twice a year. The hooded crow, the species in this footage, lives in Israel year-round and has been spreading across the country for decades. It thrives on city garbage and streetlights. A warm coastal city at dusk in late March, with overflowing bins everywhere, is basically a crow buffet. The "harbinger of doom" thing comes from the Bible and medieval Europe, where people noticed crows gathering near battlefields and plague sites. But the crows showed up after the death. They were eating. People saw the pattern, flipped the cause and effect, and the superstition stuck for a few thousand years. What you're actually watching is one of the smartest animals alive running a logistics network that a Tel Aviv University scientist explained over 50 years ago.

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Ayan Banerjee
Ayan Banerjee@ayanban7·
These appear to be civilians of Iran. And possibly, their opinion represents that of the majority. I may be against the regime governing my country, but that does not mean support to outsiders bent on destroying it.
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Anindita Bhadra
Anindita Bhadra@Abhadra7·
Emails are being ignored. A well performing student is suffering during the last year of his #PhD. When he needs to focus on his data analysis and thesis writing, manuscripts and the final leg of the journey, he is stressed, running from desk to desk, seeking answers.
Arpan Bhattacharyya@Arpan_ZG

My CSIR 5th year extension got rejected for a 6 day delay in document submission. There was no clear intimation about the deadline. A mail from my supervisor, justifying the delay got no reply. An alarming situation for PhDs in India! #SOS @Abhadra7 @CSIR_HRDG @EduMinOfIndia

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Ayan Banerjee
Ayan Banerjee@ayanban7·
@abandopa @Abhadra7 @ghonada My optimism (somewhat desperate) is waning. Appears this five day wait is more for market-management than genuine de-escalation. Strangely, an explosion happened today at a gas facility in the US. Hopefully a coincidence. I shudder to think of the implications if it's not!
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Ayan Banerjee
Ayan Banerjee@ayanban7·
Terrifying. But somehow I think things will not come to this. Perhaps things will cool down this week. Otherwise, this is a point of no return. For the future of this planet I think. @Abhadra7 @abandopa @ghonada
Shanaka Anslem Perera ⚡@shanaka86

BREAKING: In the last 24 hours, the 2026 Iran war crossed four thresholds simultaneously. Each one would be the lead story of any other week. Together they form the architecture of an escalation spiral that has no off-ramp visible from any capital on Earth. First. Iran struck Arad and Dimona in southern Israel on Saturday night, injuring approximately 180+ people. These are the towns nearest Israel’s Negev nuclear research centre. Tasnim confirmed the strikes were retaliation for Israel’s attack on the Natanz nuclear facility. Iranian missiles penetrated Israeli air defences and left large craters in residential areas. Prime Minister Netanyahu called it “a very difficult evening in the battle for our future.” The IRGC said it targeted military installations across five cities: Arad, Dimona, Eilat, Beersheba, and Kiryat Gat. Second. Israel continued strikes on Tehran and Isfahan overnight into Sunday. Massive joint US-Israeli air raids hit multiple areas of the capital. CENTCOM confirmed the US has now struck over 8,000 military targets across 23 days of war, including 130 Iranian vessels, which it called “the largest elimination of a navy over a three-week period since World War II.” Iran’s energy minister confirmed on Sunday that “the country’s vital water and electricity infrastructure has suffered heavy damage” from US and Israeli strikes, including “dozens of water transmission and treatment facilities” and “critical water supply networks.” Israel previously struck South Pars, Iran’s portion of the world’s largest gas field. Eighty percent of Iranian electricity comes from natural gas. The attack on South Pars directly threatens power generation for 90 million people. Third. President Trump posted his 48-hour ultimatum Saturday night: reopen the Strait of Hormuz by Monday evening or the US will “hit and obliterate” Iranian power plants “starting with the biggest one first.” Iran’s armed forces responded that the strait would be “completely closed” if power plants are hit. Parliament Speaker Ghalibaf posted on X that all energy and oil infrastructure across the entire region would become “legitimate targets” and be “irreversibly destroyed.” That word “irreversibly” is doing the work of a thousand missiles. It means desalination plants. It means refineries. It means the infrastructure that produces drinking water for the Arabian Peninsula. Fourth. Saudi Arabia expelled Iranian diplomats. Riyadh declared the military attache, his deputy, and three other embassy members persona non grata with 24 hours to leave. This follows ongoing Iranian strikes on Saudi territory. Turkey’s foreign minister warned from Riyadh that Gulf countries may be forced to retaliate. The Gulf states, which have so far absorbed Iranian attacks without entering the war, are running out of room. Now hold all four escalations simultaneously. Iran strikes Israel’s nuclear doorstep. Israel and the US hammer Iranian water and power. Trump sets a 48-hour clock on power plant destruction. Iran promises permanent Hormuz closure and irreversible destruction of regional infrastructure if the clock runs out. Saudi expels Iranian diplomats. The Gulf moves toward belligerency. Brent trades above $113. WTI above $100. Goldman forecasts $110 to $125 for April with tail risk to $150. The IEA has released 400 million barrels of emergency reserves, the largest in history. The 48-hour clock expires Monday evening. Every barrel trapped in the Gulf is a barrel that does not become fertilizer. Every power plant destroyed in Iran is a megawatt that does not synthesise ammonia. Every desalination plant threatened in the Gulf is drinking water for millions. The war is no longer about missiles and territory. It is about molecules: water, nitrogen, helium, crude. The missiles are the mechanism. The molecules are the consequence. And the clock is ticking. Full Deep dive article - open.substack.com/pub/shanakaans…

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Ayan Banerjee
Ayan Banerjee@ayanban7·
Hah! Good to see myself vindicated in hours! Of course things can still turn sour if Israel jumps the game, but I strongly feel people have had enough! @abandopa @Abhadra7 @ghonada @ydnad0
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