Here is a concise summary of the text:
**Uncommon Human Abilities and Party Tricks**
* **Rare skills:**
+ Writing with both hands equally well (1% of population, ~70 million people)
+ Raising both eyebrows separately (rarer than raising one)
+ Hyper mobility (twisting body into unusual positions)
+ Withstanding extreme cold without discomfort
* **Party tricks and challenges:**
+ Rotating palm with ring on elbow without it falling (~2% success rate)
+ Licking one's elbow or touching thumb to forearm (flexibility test)
+ Tying a cherry stem in a knot with the tongue ( Guinness World Record: 14 knots in 1 minute)
+ Rolling the sides of the tongue up to make a "U" shape (~65-81% success rate, more common in women)
+ Curling the tongue back into the mouth (Kitri Mudra, a yoga asana)
+ Wiggling one or both ears intentionally (~22% and ~18% success rates, respectively)
* **Brain and body exercises:**
+ Mirror writing and drawing to awaken neurons and balance brain hemispheres
+ Rotating foot while drawing a number to challenge brain coordination
+ Standing on one foot with eyes closed to test vestibular system
Here are the key facts extracted from the text, numbered and in short sentences, excluding opinions:
**Physical Abilities**
1. About a third of people can raise one eyebrow (left or right).
2. Raising both eyebrows separately is a rare ability.
3. Only 1% of the population (around 70 million people) are naturally ambidextrous.
4. Around 10% of people can touch the tip of their nose with their tongue.
5. The average adult male tongue is approximately 3.3 inches long.
6. The average adult female tongue is approximately 3.1 inches long.
7. About 65-81% of people are natural tongue rollers, with the majority being women.
8. Around 22% of people can wiggle one ear intentionally.
9. Only 18% of people can move both ears at once.
**Health and Body**
10. About 90% of people are right-handed, and 10% are left-handed.
11. Hypermobility allows rare individuals to twist their bodies into unusual positions.
12. People with hypermobility may have increased sensitivity due to a larger medulla.
**Records and Exceptions**
13. Nick Stobert from the USA holds the Guinness World Record for the longest tongue (3.97 inches).
14. Another contender in the Indian Book of Records has a tongue measuring 10.8 inches.
15. Al Glenetsky set the Guinness World Record for most cherry stem knots made in one minute (14) in June 2014.
**Brain and Nervous System**
16. The cerebellum area of the brain monitors movements and predicts sensations.
17. The vestibular system, including the inner ear and vision, helps the body stay balanced.
18. The left area of the brain struggles with handling two opposite rotations simultaneously.