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🤯 Wacky fact of the day · Human Body

The brain uses about 20% of the body’s energy.

Although it is only around 2% of body weight, the brain consumes roughly a fifth of the body’s energy at rest.

Why? How? →Source ↗

AJ's Techie & Wacky World

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Atul Vij

Build Your Own LLM, Lesson 3: A Language Model Made of Counting

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3 Nov 2025 · Build Your Own LLM · 3 min read

Build Your Own LLM, Lesson 3: A Language Model Made of Counting

Build a bigram language model with plain Python dictionaries, generate text from it, and measure it with loss — the same number every LLM…

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3 November 2025 by Atul Vij Build Your Own LLM

Why Do Onions Make You Cry?

Why Do Onions Make You Cry? featured illustration

31 Oct 2025 · Science · 1 min read

Why Do Onions Make You Cry?

Cutting an onion breaks its cells, setting off a chemical chain reaction that releases a gas which irritates your eyes. The science, and the…

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31 October 2025 by Atul Vij Science

PowerPoint Intermediate Lesson 8: Project – A Monthly Review Deck That Updates Itself

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31 Oct 2025 · PowerPoint · 1 min read

PowerPoint Intermediate Lesson 8: Project – A Monthly Review Deck That Updates Itself

Final project: brand template, Title + Chart layouts, Excel-linked or generated charts, a Summary Zoom menu and Morph for the headline, rebuilt every month…

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31 October 2025 by Atul Vij PowerPoint

PowerPoint Intermediate Lesson 7: Accessible Slides

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30 Oct 2025 · PowerPoint · 1 min read

PowerPoint Intermediate Lesson 7: Accessible Slides

Make decks work for everyone: the Accessibility Checker, alt text, reading order, unique slide titles, contrast and captions for recorded presentations.

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30 October 2025 by Atul Vij PowerPoint

PowerPoint Intermediate Lesson 6: Generate Slides From Data With Python

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29 Oct 2025 · PowerPoint · 1 min read

PowerPoint Intermediate Lesson 6: Generate Slides From Data With Python

Build one slide per region, product or branch automatically from an Excel file with python-pptx: titles, native charts and status text, ready to re-run…

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29 October 2025 by Atul Vij PowerPoint

PowerPoint Intermediate Lesson 5: Sections and Zoom Navigation

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28 Oct 2025 · PowerPoint · 1 min read

PowerPoint Intermediate Lesson 5: Sections and Zoom Navigation

Organise long decks with sections and use Summary Zoom and Section Zoom to jump to any part during a meeting and come back automatically.

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28 October 2025 by Atul Vij PowerPoint

PowerPoint Intermediate Lesson 4: Morph for Before-and-After Stories

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27 Oct 2025 · PowerPoint · 1 min read

PowerPoint Intermediate Lesson 4: Morph for Before-and-After Stories

Use the Morph transition to move, resize and recolour objects smoothly between two slides, and force matches with !! object names.

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27 October 2025 by Atul Vij PowerPoint

PowerPoint Intermediate Lesson 3: Charts Linked to Excel That Update

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26 Oct 2025 · PowerPoint · 2 min read

PowerPoint Intermediate Lesson 3: Charts Linked to Excel That Update

Paste charts as links so this month's numbers flow into the deck: paste link vs embed, updating, Edit Links, and what breaks links when…

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26 October 2025 by Atul Vij PowerPoint

Why Is the Sky Blue (and Sunsets Red)? Explained in Two Minutes

Why Is the Sky Blue (and Sunsets Red)? Explained in Two Minutes

25 Oct 2025 · Science · 2 min read

Why Is the Sky Blue (and Sunsets Red)? Explained in Two Minutes

The sky is blue because air scatters short (blue) wavelengths of sunlight much more than long (red) ones — Rayleigh scattering. Why it is…

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25 October 2025 by Atul Vij Science

PowerPoint Intermediate Lesson 2: A Brand Template (.potx) for the Whole Team

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25 Oct 2025 · PowerPoint · 1 min read

PowerPoint Intermediate Lesson 2: A Brand Template (.potx) for the Whole Team

Turn your master into a company template: theme colours and fonts, only the layouts people need, saved as .potx and shared so every new…

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25 October 2025 by Atul Vij PowerPoint

VBA Files and Folders + Final Project: Combine a Month of Reports Automatically

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24 Oct 2025 · Excel VBA · 4 min read

VBA Files and Folders + Final Project: Combine a Month of Reports Automatically

Excel VBA course lesson 15: loop through files with Dir, create folders, check whether files exist, read text/CSV files, then build the final project…

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24 October 2025 by Atul Vij Excel VBA

PowerPoint Intermediate Lesson 1: Slide Master and Custom Layouts

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24 Oct 2025 · PowerPoint · 2 min read

PowerPoint Intermediate Lesson 1: Slide Master and Custom Layouts

Stop formatting slide by slide: set fonts, colours and logo once in the Slide Master and create your own layouts such as "Title +…

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24 October 2025 by Atul Vij PowerPoint

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