Children's Art Has Its Own Logic
Even simple scribbles are meaningful. While it was once thought that kids only scribbled to experience the physical sensation of moving their arm along the page, “now it’s been shown that when children are scribbling … they’re representing through action, not through pictures,” said Boston College’s Winner. “For example, a child might draw a truck by making a line fast across the page and going ‘zoom, zoom,’ and so it doesn’t look like a truck when the child is done, but i...
notesThis reminds me of Sagan's pumpkin-carving, where he made random cuts and took out chunks to make it scarier with more "bloody guts."
Study is More Efficient Than Contemplation
吾嘗終日而思矣，不如須臾之所學也。吾嘗跂而望矣，不如登高之博見也。登高而招，臂非加長也，而見者遠；順風而呼，聲非加疾也，而聞者彰。假輿馬者，非利足也，而致千里；假舟楫者，非能水也，而絕江河。君子生非異也，善假於物也。
2 [Translated] Once I spent an entire day in thought, but it was not as good as a moment of study. Once I stood on tiptoe to gaze into the distance, but it was not as good as climbing to a high place to get a broad view. Climbing to a high place and waving will not make your arm any longer, but you can be seen from farther away. Shouting down the wind will give your voice no added urgency, but you can be heard more distinctly. By borrowing a horse and carriage you will not improve your feet, but you can cover a thousand li. By borrowing a boat and paddles you will not improve your ability in water, but you can cross rivers and seas. The noble person is by birth no different from others, but he is good at borrowing from external things.
Mathematical Proof that an Arm's Length of DNA is in Ever...
We know from X-ray diffraction studies that a strand of DNA is 1.5 nanometers (1.5 x 10 to the -9 meters) in radius. Assume a cylinder 1 meter long (the arm's length) with a radius of 1.5 nanometers and work out the volume (length x pi r-squared). A typical animal cell is about 8 micrometers (8 x 10 to the -6 meters) in radius. Assume a spherical cell and calculate the volume (4/3 pi r-cubed). Do it yourself. You will see that the DNA fits easily inside the cell, with plenty of room for all o...Chet Raymo does the math to demonstrate this seemingly impossible scientific facts.
Tummy-Time Improves Infant Motor Skills
The recent trend of putting young babies to sleep on their backs also appears to be having an effect on their motor skill acquisition. This posture, which has proven advantageous in reducing the number of SIDS fatalities, does not permit babies to exercise their arm and neck muscles as much as and see the world. In one recent study, pediatricians found that babies who slept on their backs were significantly slower to roll over, sit, crawl, and pull to stand than babies who slept on their stom... notesBy forcing the infant to work their neck and back to look around while on their tummy, they strengthen these important muscles; however, the infant should still remain on their back while sleeping to prevent SIDS.
A Useful Metaphor for Maintaining Momentum
"My boy is having his problems being a serious student," I told Eddie.
"Well, your studying is very important," Eddie said, while the boy sat smiling a smile that said: an old person his about to hand out some Wisdom. Could this please be over fast? "You know, a jet plane burns its greatest energy taking off; but once it reaches its cruising altitude, it burs less fuel. Just like studying. If you're constantly taking off and landing, you're going to burn more fuel as opposed to taking off an...
1 The metaphor of a plane burning its most fuel when it takes off, and using less to maintain its soaring altitude works for studying, exercise, eating well, and a host of other good behaviors in life.
