eSagan 🇮🇳 @crackurbones@qoto.org

How Did Whales Get So Big?
https://odysee.com/@MinutePhysics:5/how-did-whales-get-so-big:2
Optical Engineer Rik ter Horst shows us how he makes very small telescopes (at home) which are intended for use in micro-satellites.
https://youtu.be/HxwhCmO90UQ
Do you understand this viral (very good) math movie clip?
https://www.youtube.com/watch?v=04x4ZdLpN-0
This Astronomer Is Determined to Find Another Earth
https://www.youtube.com/watch?v=Y-8lb0r6D5k
Could pi be different in another universe? | How randomness defines our reality #SoME1
https://www.youtube.com/watch?v=Tb76LQRRIdU

Carbon nanotube - Wikipedia
https://en.wikipedia.org/wiki/Carbon_nanotube
The shortest carbon nanotube can be considered to be the organic compound cycloparaphenylene, which was synthesized in 2008 by Ramesh Jasti.[21] Other small molecule carbon nanotubes have been synthesized since.[22]

Cycloparaphenylene - Wikipedia
https://en.wikipedia.org/wiki/Cycloparaphenylene
In 1934 by V. C. Parekh and P. C. Guha described the first published attempt to synthesize a cycloparaphenylene, specifically [2]CPP. They connected two aromatic rings with a sulfide bridge, and hoped that removal of the latter would yield the desired compound. However, the attempt failed as the compound would have been far too strained to exist under anything but extreme conditions.[3]

New, non-invasive blood sugar testing methods using saliva
https://phys.org/news/2021-10-non-invasive-blood-sugar-methods-saliva.html
Gao's prototype saliva sensor uses copper nanomaterials which are anchored on a base strip made of graphene sheet. Graphene is an inexpensive carbon material that generally does not react with other compounds. "Graphene strips are thin and flexible just like paper, so you can deposit the materials on the top and it's still flexible," says Gao. "It's a promising substrate in biosensors."

Differentiation Practice Megathread
http://mathb.in/65994

This is a set of extra differentiation practice exercises I offer to my students each term. Feel free to discuss and even your own attempts at answers.

For an extra fun challenge, look at item 100 :slashersmile:.
https://www.reddit.com/r/calculus/comments/q8zouv/differentiation_practice_megathread/

A Big Bet on Nanotechnology Has Paid Off - Scientific American
https://www.scientificamerican.com/article/a-big-bet-on-nanotechnology-has-paid-off/
New nanostructure could be the key to quantum electronics
https://phys.org/news/2021-10-nanostructure-key-quantum-electronics.html
Eat these 5 foods to sharpen your brain health, memory and focus, says Harvard nutritionist
https://www.cnbc.com/2021/10/08/foods-that-sharpen-brain-health-memory-and-focus-according-to-harvard-nutritional-psychiatrist.html
How Wavelets Allow Researchers to Transform — and Understand — Data | Quanta Magazine
https://www.quantamagazine.org/how-wavelets-allow-researchers-to-transform-and-understand-data-20211013/
Enjoy It While You Can: Dropping Oxygen Will Eventually Suffocate Most Life on Earth
https://www.sciencealert.com/enjoy-it-while-you-can-dropping-oxygen-will-eventually-suffocate-most-life-on-earth
Caltech Science Exchange: How Do Scientists Explain Quantum Entanglement?
https://www.youtube.com/watch?v=TS_gx7pUyLg

WHAT IS LIFE - DNA and Dublin Schrodinger James Watson, francis Crick, Maurice Wilkinson, Rosalind Franklin, Charles Jencks
http://www.whatislife.ie/schrodinger.htm
Schrödinger, in war-isolated Dublin, did not know that excellent evidence that DNA was the genetic material had been produced by Oswald Avery and colleagues in New York. He argued from first principles that genes had to contain information, and they had to replicate. His idea of the aperiodic crystal is realised in the form of the DNA molecule. Watson and Crick sent a copy of their paper describing the Double Helix to Schrödinger in 1953 saying how they had been influenced by him.

Watch | Mangalyaan: 7 years in orbit - The Hindu
https://www.thehindu.com/sci-tech/science/mangalyaan-7-years-in-orbit/article36978815.ece
The indigenously made #Mangalyaan, is the only artificial satellite that could image the full disc of Mars in one view frame, and also image, the far side of Deimos, the outer and smaller of Mars’s two moons.

EarthSky | Photosynthesis in Venus’ atmosphere?
https://earthsky.org/space/photosynthesis-in-venus-atmosphere-phototrophs-microbes/
Ancient mass grave, WWII bunker among new finds in Haydarpaşa dig | Daily Sabah
https://www.dailysabah.com/life/history/ancient-mass-grave-wwii-bunker-among-new-finds-in-haydarpasa-dig
Countdown begins for Turkey's largest infrared telescope | Daily Sabah
https://www.dailysabah.com/turkey/countdown-begins-for-turkeys-largest-infrared-telescope/news

Classical physics make time travel impossible. But what about 'timeless' travel?
https://thenextweb.com/news/classical-physics-make-time-travel-impossible-but-what-about-timeless-travel
3Blue1Brown - Newton's Fractal (which Newton knew nothing about)
https://www.3blue1brown.com/lessons/newtons-fractal
Sleep loss will not make you emotionally numb
https://lifestyle.livemint.com/health/wellness/sleep-loss-will-not-make-you-emotionally-numb-111634048213344.html
With a New Space Telescope, Laura Kreidberg Will Probe Exoplanet Skies | Quanta Magazine
https://www.quantamagazine.org/with-a-new-space-telescope-laura-kreidberg-will-probe-exoplanet-skies-20211012/

5 Hot Weather Tips that Could Save an Older Adult’s Life
https://healthblog.uofmhealth.org/wellness-prevention/5-hot-weather-tips-could-save-an-older-adults-life
Heat-related health dangers for older adults soar during the summer | National Institutes of Health (NIH)
https://www.nih.gov/news-events/news-releases/heat-related-health-dangers-older-adults-soar-during-summer
As we age, our ability to adequately respond to summer heat can become a serious problem. Older people are at significant increased risk of heat-related illnesses, known collectively as hyperthermia, during the summer months. ... Age-related changes to the skin such as poor blood circulation and inefficient sweat glands. 27-Jun-2018

Watch "See How Termites Inspired a Building That Can Cool Itself | Decoder" on YouTube
https://youtu.be/620omdSZzBs

Watch "MOSFET – The Most significant invention of the 20th Century" on YouTube
https://youtu.be/bHwl8TdEI6k

Protecting India’s natural laboratories - The Hindu
https://www.thehindu.com/opinion/op-ed/protecting-indias-natural-laboratories/article36951846.ece
Teaching Ancient Brains New Tricks: Study Shows How Modern Physicists Think - Neuroscience News
https://neurosciencenews.com/physicist-brain-concepts-19448/
Sleep Loss Does Not Impact Ability to Assess Emotional Information - Neuroscience News
https://neurosciencenews.com/sleep-loss-emotional-processing-19449/

How digging up the past helps us understand the present
https://lifestyle.livemint.com/news/big-story/how-digging-up-the-past-helps-us-understand-the-present-111633687336319.html
Wildlife Conservation on Ice: Frozen Zoos To Save Animals
https://scitechdaily.com/wildlife-conservation-on-ice-frozen-zoos-to-save-animals/
Turkey's 8,000-year-old site to show daily life of ancient farmers | Daily Sabah
https://www.dailysabah.com/life/history/turkeys-8000-year-old-site-to-show-daily-life-of-ancient-farmers
New Dates Reveal India’s Youngest Acheulean Tools - Archaeology Magazine
https://www.archaeology.org/news/10036-211006-india-acheulean-tools
Silicon solar cell developed in Turkey offers cheaper solution | Daily Sabah
https://www.dailysabah.com/turkey/silicon-solar-cell-developed-in-turkey-offers-cheaper-solution/news
A magnetic patch on a twitchy arm makes a useful current
https://www.nature.com/articles/d41586-021-02680-7

Clues to consciousness: how dopamine fits into the mystery of what makes us conscious – podcast
https://theconversation.com/clues-to-consciousness-how-dopamine-fits-into-the-mystery-of-what-makes-us-conscious-podcast-169418
Watch "The Scientific Problem of Consciousness" on YouTube
https://youtu.be/CJhSSPO8Ulk

The faster-than-fast Fourier transform
https://phys.org/news/2012-01-faster-than-fast-fourier.html
“In nature, most of the normal signals are sparse,” says Dina Katabi, one of the developers of the new algorithm. Consider, for instance, a recording of a piece of chamber music: The composite signal consists of only a few instruments each playing only one note at a time. A recording, on the other hand, of all possible instruments each playing all possible notes at once wouldn’t be sparse — but neither would it be a signal that anyone cares about.

Graphene in Space: Wonder Material Strengthens New Space Habitat Prototype
https://interestingengineering.com/graphene-in-space-wonder-material-strengthens-new-space-habitat-prototype
TIL that Andre Geim won the Ignobel prize in 2000 for levitating a frog and then won the Nobel prize in 2010 for his work on Graphene. He is the only person to win both awards.
https://www.reddit.com/r/todayilearned/comments/pngoml/til_that_andre_geim_won_the_ignobel_prize_in_2000/
https://en.wikipedia.org/wiki/Andre_Geim

Intramuscular injections can accidentally hit a vein, causing injection into the bloodstream. This could explain rare adverse reactions to Covid-19 vaccine. Study shows solid link between intravenous mRNA vaccine and myocarditis (in mice). Needle aspiration is one way to avoid this from happening.
https://www.reddit.com/r/science/comments/q1uud9/intramuscular_injections_can_accidentally_hit_a/
https://pubmed.ncbi.nlm.nih.gov/34406358/

IIT Guwahati researchers develop water repellent material for wearable motion sensors - Education Today News
https://www.indiatoday.in/education-today/news/story/iit-guwahati-researchers-develop-water-repellent-material-for-wearable-motion-sensors-1858897-2021-09-29

Indian research team develops hydrogel to regenerate cornea
https://timesofindia.indiatimes.com/city/hyderabad/iit-h-research-team-develops-hydrogel-to-regenerate-cornea/articleshow/86627120.cms

https://www.reddit.com/r/OfficialIndia/comments/pybqee/indian_research_team_develops_hydrogel_to/

Indian Scientists Develop Large Scale Reactor For Cost-Effective Production Of Hydrogen Using Sunlight And Water
https://swarajyamag.com/news-brief/indian-scientists-develop-large-scale-reactor-for-cost-effective-production-of-hydrogen-using-sunlight-and-water

How memories persist where bodies, and even brains, do not | Aeon Essays
https://aeon.co/essays/how-memories-persist-where-bodies-and-even-brains-do-not
How can animals whose brains have been drastically remodelled still recall their kin, their traumas and their skills?

Graphene Jolts Sodium-Ion Battery Capacity - IEEE Spectrum
https://spectrum.ieee.org/graphene-sodium-ion-battery-capacity

'Most perfect graphene ever' grows fold-free on metal foil – Physics World
https://physicsworld.com/most-perfect-graphene-ever-grows-fold-free-on-metal-foil/

Quantum computing hits the desktop, no cryo-cooling required
https://newatlas.com/quantum-computing/quantum-computing-desktop-room-temperature/
Injecting dead bacteria into tumors points to promising cancer treatment
https://newatlas.com/science/cancer-immunotherapy-dead-bacteria-tumors/
Information Can Reduce Selfish Behavior - Neuroscience News
https://neurosciencenews.com/selfish-behavior-information-19377/