Roger Radu 🇨🇦 (🌻in solidarity with🇺🇦)

A history, geography, and politics buff who has lived on three continents, loves to cook, travel, enjoy life and have fun with my awesome wife.

[Roger Radu 🇨🇦 (🌻in solidarity with🇺🇦) @Roger_Radu]

Russia today is a brutal medieval barbaric state which rests on lies, corruption, coercion, paranoia, and lawlessness. Not just its elites but also ordinary Russians who think it is normal to lie, steal, rape, pillage, torture and kill without remorse.
https://t.co/jzeIRiDZsn

[Historic Hub @HistoricHub]

One of the most breathtaking train rides in the world.
The Bernina Express travels from Chur, Switzerland to Tirano, Italy on the Rhaetian Railway. It crosses 196 bridges and 55 tunnels, climbs over the Bernina Pass, and then descends into Italy

[Barack Obama @BarackObama]

As President, I would read 10 letters a day sent to me by ordinary Americans. At the Obama Presidential Center, we’ll have some of the letters I read — and responded to — every night. I still get emotional reading them, and it’s one of my favorite exhibits.

[Sulekha Tripathi @sulekhat95]

INSTEAD OF WATCHING AN HOUR OF NETFLIX TONIGHT.

This 1 hour Stanford lecture by Joel Peterson will teach you more about negotiation and getting what you want than most people learn in years.

Bookmark it and give it an hour, no matter what.

[Physics-astronomy @Physicsastronmy]

This isn’t lava. 🔥🌄

For a few minutes each year, Horsetail Fall in turns into a glowing “firefall” as sunset hits the waterfall at the perfect angle.

When the light, weather, and water flow align perfectly, the entire cliff looks like it’s melting with fire.

And the craziest part?

It’s completely real.

Thousands wait every year just to witness these few seconds of perfect natural alignment.

Nature creates moments no CGI can truly copy. ✨

📍California, USA

[Rahul @sairahul1]

Anthropic pays $750,000+ a year for engineers who know how to build LLMs from scratch.

Stanford just released the exact lecture that teaches it - 1 hour 44 minutes, free, straight from CS229.

Bookmark and watch it this weekend.

It'll teach you more about how ChatGPT & Claude actually work than most people at top AI companies learn in their entire careers.

[Meanwhile in Ukraine @MeanwhileInUA]

Putin didn't invade Ukraine because of NATO. He invaded because Ukrainians were proving democracy works.

Historian and Pulitzer Prize winner Anne Applebaum puts it plainly: Putin looked at Ukraine's democratic movement and thought, "If they can do it in Ukraine, then people could do it in Russia. So I need to crush this."

That's the real threat Ukraine posed. Not missiles. Not borders. A working democracy next door.

Applebaum frames the war as a fault line between the democratic and autocratic worlds. Russia isn't just trying to take territory. It's trying to erase Ukraine as a nation, reduce it to a colony, and send a message to every country that the post-1945 rules of Europe no longer apply.

Those rules were simple: no invasions, no wars, borders don't change by force. Russia understood exactly what it was breaking when it crossed into Ukraine.

[Radha Tripathi @Radha_AI]

A man spends 50 years teaching at MIT.

He knows his time is running out.

So he records one last lecture — everything he knows, distilled into a single hour.

He died 5 months later.

This is that lecture.

The most important hour you'll watch this week. 👇
Bookmark it for later

[The Kobeissi Letter @KobeissiLetter]

BREAKING: US Consumer Sentiment officially falls to its lowest level on record in data going back to 1952, down another -10% last month.

Consumers now see inflation rising to 4.8% over the next 12 months.

This puts the Consumer Sentiment index down -21% since February 2026, before the Iran War.

Not even the 1980s saw Consumer Sentiment this low.

[Wonder of Science @wonderofscience]

Sea lions playing in huge waves near Santa Barbara Island.

📽: Ryan Lawler

[Curiosity @CuriosityonX]

Thousands of generations of humans lived and died never knowing what a sunset looked like anywhere but Earth.

You're in the first generation that doesn't have to.

This is a sunset on Mars.

140 million miles away from us.

[MARMOT @Web3Marmot]

🚨 BIG TROUBLE AHEAD!!

The S&P 500 is up 25% since October.

No real pullbacks. Just straight up.

Here is what almost nobody is watching:

Volume has been fading for 4 months straight.

This is exactly how every major correction has begun.

The pattern is always the same:

Phase 1: Strong multi‑week rally → DONE
Phase 2: Momentum starts to weaken → WE ARE HERE
Phase 3: A brutal 20%+ crash → LOADING

The index right now is a complete house of cards.

35% of the S&P 500 sits in just 8 names.

And NVDA alone accounts for nearly 40% of this year's gains.

The entire market is riding on one overextended AI narrative.

One disappointment and the dominoes will fall.

Initial targets: 6,200 – 6,000.

That's where the macro lows get swept and support gets retested.

Don't let this trap wipe you out.

Remember, I've predicted every major turn for the last 10 years, including the exact $16K BTC bottom three years ago and the $111K top in October.

Turn on notifications. I’ll guide you through this correction, and when the real bottom finally forms, I'll call it here publicly.

[Joel Colmenares. @ModReflexion]

El rover Curiosity de la NASA ha revelado cómo se ve el cielo nocturno en Marte, que está a 225 millones de kilómetros de distancia.

[Roger Radu 🇨🇦 (🌻in solidarity with🇺🇦) @Roger_Radu]

@DrNadia72 Claude

[Jason Ai. Williams @GoingParabolic]

This may be the most majestic thing I’ve ever seen.

[Roger Radu 🇨🇦 (🌻in solidarity with🇺🇦) @Roger_Radu]

@MasterAi254 Claude.

[Sam AI @AIandTechh87]

Claude is offering 13 AI courses & certificates.

All free. Here are all 13 links (+ my own guides):

1. Go to each link below. Enroll. It's free.
3. I'll explain at the end. Start with the official ones:

---

1 - Claude 101. Learn Claude for everyday work.
↳ https://t.co/WU3nUvO3gk

2 - AI Fluency: Frameworks & Foundations.
↳ https://t.co/MObifetUVd…

3 - Introduction to Agent Skills.
↳ https://t.co/olNsxMvNwF…

4 - Building with the Claude API.
↳ https://t.co/xBGWdBzBsb…

5 - Claude Code in Action.
↳ https://t.co/DqMPPCEF6u…

6 - Intro to Model Context Protocol.
↳ https://t.co/olNsxMvNwF…

7 - MCP: Advanced Topics.
↳ https://t.co/2vXcoanLg0…

8 - AI Fluency for Students.
↳ https://t.co/bTxtTfJVVl…

9 - AI Fluency for Educators.
↳ https://t.co/bTxtTfJVVl…

10 - Teaching AI Fluency.
↳ https://t.co/xz3p0sGX59…

11 - AI Fluency for Nonprofits.
↳ https://t.co/bTxtTfJVVl…

12 - Claude with Amazon Bedrock.
↳ https://t.co/J0mQauX0F7…

13 - Claude with Google Cloud's Vertex AI.
↳ https://t.co/chXkbpAQpf…

---

Official courses are good. But they're theoretical.
I wrote how-to guides that show you what to do.

Here's how to master Claude (for free):

1. Start here: https://t.co/aaGtuJHXLM
☑ The basics of Claude.
☑ How to prompt it the right way.
☑ The different types of Claude to master.

2. Move to Cowork: https://t.co/ZMn7WqeJSb
☑ The more advanced Claude is Claude Cowork.
☑ How to prompt it and set it up properly.
☑ It's a long process. But worth every minute.

3. Set up Claude for teams: https://t.co/GbOf8gutcg
☑ Setting up Claude for teams is different.
☑ This is the easiest 5-day plan I could find.
☑ 5 steps so your team runs on Claude in a week.

4. Use Claude Skills:
☑ Stop prompting, build your first skill.
☑ 7 favourite hacks of Claude Skills.
☑ Access Claude's team skills.

5. Claude Computer:
☑ Access Claude Computer.
☑ Use cases of Claude Computer.
☑ Schedule tasks with Claude.

6. Claude Code:
☑ English is the new code.
☑ Code 100x faster.
☑ Prompt Claude Code the right way.

7. Bonus (to go even deeper).
☑ Claude for Excel.
☑ Claude interactive charts.
☑ How to move from ChatGPT to Claude.

---

◾All of this is free , Follow @AIandTechh87
◾Like and comment your views
♻️ Repost this so others get free AI education.

[Jason Furman @jasonfurman]

One thing I enjoy at the NYT is responding to some of the reader comments (sadly only a tiny fraction), you can read it here. A number of other authors do the same so look out for them when you see the author photo in the comment box. https://t.co/c5Dh4gNq0b

[Roger Radu 🇨🇦 (🌻in solidarity with🇺🇦) @Roger_Radu]

@Mohiniuni Claude

[Roger Radu 🇨🇦 (🌻in solidarity with🇺🇦) @Roger_Radu]

@RodmanAi Claude

[Emmett Voss @Emmett_Voss]

Steve Jobs called Bill Hewlett at 12 years old and got a job at HP.

Most people never make that call.

Jobs wanted to build a frequency counter but lacked the parts. So he looked up Bill Hewlett's number in the Palo Alto phone book and dialed.

"Hi, I'm Steve Jobs. I'm 12 years old. I'm a student in high school and I want to build a frequency counter. I was wondering if you had any spare parts I could have."

Hewlett laughed. Then he gave Jobs the parts and offered him a summer job at HP, building the very frequency counters he had called about.

"I was in heaven."

Jobs spent the rest of his life thinking about why that moment was possible.

"I've never found anybody that didn't want to help me if I asked them for help. I just asked."

The lesson he carried was simple but rare.

Throughout history, the people who shaped the world were rarely the most talented or the most connected. They were the ones willing to make the ask that everyone else had already talked themselves out of.

"Most people never pick up the phone and call. Most people never ask. And that's what separates sometimes the people that do things from the people that just dream about them."

"If you're afraid of failing, you won't get very far."

The phone book that connected a 12-year-old to a Silicon Valley legend is long gone.

The principle behind that call never changed.