David J. Baker

[Farm Girl Carrie 👩‍🌾 @FarmGirlCarrie]

True?

[David J. Baker @davidjbakerinc]

@DailyLoud Sadly Americans have been doing this for generations

[David J. Baker @davidjbakerinc]

@jjauthor Fake news

[Math Files @Math_files]

People often say mathematicians are not afraid of anything—except one thing: the Collatz Conjecture.

It is one of the most famous unsolved mysteries in mathematics.

Here’s how it works:
Pick any positive number.
If the number is odd, multiply it by 3 and add 1.
If the number is even, divide it by 2.

Now repeat this process again and again.

For example, start with 7:
7 is odd → 3×7 + 1 = 22
22 is even → 22 ÷ 2 = 11
11 is odd → 3×11 + 1 = 34
…and so on we get:

7 → 22 → 11 → 34 → 17 → 52 → 26 → 13 → 40 → 20 → 10 → 5 → 16 → 8 → 4 → 2 → 1

The surprising claim is this: no matter which number you start with, you will always eventually reach 1.

It sounds simple, but no one has been able to prove that it is true for all numbers. That’s why it remains a mystery.

[David J. Baker @davidjbakerinc]

@AfricanHub_ He was right there.

[David J. Baker @davidjbakerinc]

@benjitaylor @elonmusk @nikitabier Congratulations

[David J. Baker @davidjbakerinc]

@elonmusk @elonmusk agreed

[Elon Musk @elonmusk]

Accurate

[David J. Baker @davidjbakerinc]

@GigaBasedDad Fake news

[David J. Baker @davidjbakerinc]

@JadsonConc84902 @BellaJjeal 👀

[David J. Baker @davidjbakerinc]

@Cristiano Family is everything

[Black Hole @konstructivizm]

From the scorching heat of Venus to the frozen depths of Pluto, our solar system is a cosmic thermometer of extremes.
Every planet tells a different temperature story — reminding us how perfectly balanced Earth truly is.

[Physics In History @PhysInHistory]

Sir Isaac Newton was chronically lonely for most of his life. He never married, had few intimate friendships, and often withdrew from society for long periods.

His contemporaries described him as reserved and solitary.

[Night Sky Today @NightSkyToday]

BREAKING🚨: NASA Mapped the Entire Ocean floor using Gravity from Space.😮

[David J. Baker @davidjbakerinc]

@CPAC Unacceptable

[Mathematica @mathemetica]

These aren't real jellyfish... they're born from simple trigonometry alone!

Pure sine + cosine magic just created this hypnotic underwater masterpiece.

Math is so beautiful it swims!

Who knew equations could feel this alive?

[WE HAVE NO FRIENDS/BY ANY MEME NECESSARY @CLG98264897]

Can you dig it. ♥️ 🖤 💚

[Proud Native Americans @proud_native_am]

That is the first history of Americans before it was America

[Black Hole @konstructivizm]

Did you know Earth doesn't just spin — it wobbles like a cosmic top?What you're witnessing in diagrams of this phenomenon is one of the most mesmerizing yet subtle dances of our planet: axial precession — a slow, majestic gyration of Earth's rotational axis that completes a full circle roughly every 26,000 years (precisely around 25,772 years according to modern astronomical measurements). At first glance, Earth feels rock-steady: spinning once a day, orbiting the Sun once a year. But zoom out over millennia, and its 23.5° axial tilt traces out a vast, invisible cone in space — exactly like a spinning top that's starting to slow and wobble before it topples (though Earth won't topple; this is a stable, ongoing process driven by gravity).

Let's unpack the magic step by step:23.5° Axial Tilt (Obliquity) → This fixed angle (varying only slightly over longer cycles) gifts us our seasons. Without it, every latitude would experience monotonous, unchanging weather year-round — no dramatic summers or winters!
The ~26,000-Year Precession Cycle → Earth's bulging equator feels gentle gravitational tugs from the Sun and Moon, causing the axis to slowly pivot. Today, the North Celestial Pole points almost directly at Polaris (the current North Star in Ursa Minor). But rewind ~5,000 years to ancient Egypt, and Thuban in Draco reigned as pole star. Fast-forward ~12,000 years from now, and the dazzling Vega in Lyra will shine near the pole — far brighter than Polaris ever does!

Celestial Poles on the Move → Earth's geographic poles (the physical North and South Poles on the surface) stay put relative to the planet. But the celestial poles — where the axis pierces the imaginary celestial sphere — drift in slow circles against the backdrop of stars. This shifts which star claims the title of "North Star" over deep time.
Ecliptic, Equator, and Tropics → The plane of Earth's orbit (the ecliptic) intersects the celestial equator at shifting points, defining the Tropic of Cancer and Tropic of Capricorn — the northernmost and southernmost latitudes where the Sun can appear directly overhead at solstice.

Why does this epic slow-motion wobble actually matter?It plays a starring role in Milankovitch cycles, the trio of orbital variations (eccentricity, obliquity, and precession) that pace Earth's long-term climate rhythms. Precession tweaks which hemisphere gets peak summer sunlight when Earth is closest to (or farthest from) the Sun, subtly amplifying or dampening seasonal extremes over tens of thousands of years — helping trigger ice ages and interglacial warm https://t.co/sT5jtVkWMb also reshapes ancient skywatching: civilizations aligned monuments and calendars to shifting stars. And for modern astronomers and navigators, it demands constant updates to star charts and celestial https://t.co/jAImLVi9hR short, Earth isn't a static ball — it's a dynamic, ever-evolving world in a grand gravitational ballet. Next time you gaze at Polaris twinkling overhead, smile: it's only our North Star for now. In the grand cosmic timeline, the night sky itself is slowly rewriting its own story.

[Elon Musk @elonmusk]

One day, we shall sail through the moon belts of Saturn 🪐