Math
Michelle Obama on Better STEM Education for GirlsThe former first lady tells Seniorhelpline how STEM education in the U.S. could better serve young women.
How Strong Is The Hulk? We Did the Math.
We did the math to see just how strong he really is.
We Already Know How To Build a Time Machine
It’s just a matter of time before we build a machine that can take u…
Golden Ratio Explained by Math and Sunflowers
This number, approximately 1.62, has fascinated mathematicians and a…
Etch A Sketch Calculus Video Gets Kid Into MIT
Iowa teen Dezell Turner's hobby gave this college applications a ser…
Riddle of the Week #55: Edgar Allan Poe's Riddle Poem
Difficulty level: Hard
Solution to Riddle of the Week #55: Edgar Allan Poe's Riddle Poem
Difficulty level: Hard
Solution to Riddle of the Week #54: The Hardest Logic Puzzle Ever
Difficulty level: Hardest Ever
Riddle of the Week #54: The Hardest Logic Puzzle Ever
Difficulty level: Hardest Ever
Riddle of the Week #53: Knights and Knaves, Part 11
Difficulty level: Hard
Solution to Riddle of the Week #53: Knights and Knaves, Part 11
Difficulty level: Hard
Pi Makes Perfect Sense in These Simple Animations
We all know pi is (roughly) 3.14, but where did that number come from?
The "Müller-Lyer Pulsating Star" Is Our New Favorite Optical Illusion
The line segments are the same length. Really.
Solution to Riddle of the Week #52: Knights and Knaves, Part 10
Difficulty level: Hard
Riddle of the Week #52: Knights and Knaves, Part 10
Difficulty level: Hard
Solution to Riddle of the Week #51: Knights and Knaves, Part 9
Difficulty level: Very Hard
Riddle of the Week #51: Knights and Knaves, Part 9
Difficulty level: Very Hard
Why Aren't Helicopters Faster?
How physics explains why the fastest car is faster than the fastest helicopter.
The Equation That Produces a Graph of Itself
Tupper’s Self-Referential Formula describes itself, along with pretty much everything else.
Solution to Riddle of the Week #50: Knights and Knaves, Part 8
Difficulty level: Hard