Brains On! – More Sport Science: Bats and Black Eyes

Brains On! Science podcast for kids – April 14, 2026
Host: Molly Bloom | Kid Co-host: Carys from Minneapolis

Episode Overview

This lively episode dives into the science behind two sporty staples: baseball and softball bats and the mysterious black paint under players' eyes, known as “eye black.” Host Molly Bloom and her co-host Carys (a softball pitcher and hitter) field listener questions, play fun games, share creative chants, and unpack the physics, history, and quirky facts behind common baseball and softball gear.

Key Discussion Points & Insights

1. The Differences Between Baseball and Softball

• [03:22–04:21]

• Carys explains that, in softball, the balls are larger and the pitching is underhand, whereas in baseball it's overhand.
• Favorite position: Pitcher. “It’s really fun, and I just like being able to get batters out.” (Carys, 03:44)
• Softball pitching is often slow pitch with an arc; there are rules about height.
• Hitting Tip: “Keep your eye on the ball… it goes usually pretty far.” (Carys, 04:26)

2. The Science and History of Eye Black

• [05:00–10:00]

What is Eye Black and Why Do Athletes Use It?

• Listener Question: "What does eye black do for baseball players?" – Logan, Waterloo, Ontario
• Definition: Eye black is black paint or stickers players place under their eyes during games.
• Host Banter: Molly asks Carys if she’s ever used it—she hasn't, but thinks she’d look “super tough.”

The Origins and Science:

• History: The use of black paint around the eyes goes back to Ancient Egypt (“kohl”), thought to protect against glare.
• Babe Ruth (the “Bambino”) popularized it in baseball, supposedly using it to cut down on glare from sun and lights.
  “Glare is when light is reflected back at you. It can make it really hard to see when there’s like a really bright light.” (Sandon, 07:14)
• Science: Black absorbs light, so applying black paint under the eyes reduces the amount of reflected light entering the eyes.
• Explanation:
  • If you have black paint under your eyes, light “gets soaked up by the black paint.” (Sandon, 08:27)
  • Less light bouncing into your eyes means you can see the ball better.
• Does it work?
  • A few studies suggest it can help, but unclear by how much.
  • "One of those studies found that it wasn’t as helpful for people with blue eyes. Blue eyes are more sensitive to bright light. They have less of a stuff called melanin." (Sandon, 09:04)
• Bonus Reason: It also “looks cool” and can help intimidate opponents (or make you look like a raccoon, apparently).
  • “You look tough, like you didn’t get enough sleep the night before and you’re super grumpy. Or you can look like a raccoon – nature’s lovable scamp” (Sandon, 09:35)

Notable Quote:

“Black is a color that absorbs a lot of light. So imagine a little beam of light from the sun... it hits your cheeks and gets soaked up by the black paint.”
— Sandon, 07:43–08:27

3. Why Are Baseball Bats Measured in Ounces, Not Pounds?

• [14:32–16:29]

Listener Question:

• “Why are baseball bats measured in ounces?” — Liam, Nevada, California

Science of Bat Weight

• Precision matters: Ounces (16 in a pound) offer more precise measurements.
• Lighter bats are easier to swing fast but less powerful; heavier bats pack more punch but are harder to control.
• “Most players want a bat that’s somewhere in between…so it’s easier to measure in ounces.” (Molly, 15:57)
• “It’s sort of like how we measure height in feet and not miles.” (Molly, 16:04)
• Carys prefers a slightly heavier bat: “When I use a lighter one, it's harder for me to hit the ball because it kind of goes all over the place.” (16:36)

4. Bat Facts and History/Game Segment: “Spot the Bogus Bat”

• [18:20–22:17]

• Bat evolution: Early baseball bats came in all shapes and sizes, since players made their own.
• Game: Molly quizzed Carys on real vs. “bogus” historical bats.
  • Examples:
    • Banana bat: Real (curved like a banana, 1890s)
    • Squish bat: Bogus (bat made of squishy foam)
    • Zebra bat: Real (striped to distract pitchers, but never allowed in play)
    • Bat bat: Bogus (would make a sonic distraction)
    • Axe handle bat: Real (asymmetrical handle for a better grip, popular in the 2010s)

Notable Quote:

“It’s cool how we’ve been playing baseball for over 100 years, and yet people are always figuring out new ways to change things up.”
— Molly, 22:40

5. Kid Interaction & Engagement

Brainstormed Science Chants

• [13:37–14:28]

• Creative science cheers contributed by kid listeners, e.g.

  “Science, science, I love you; science, science, studies you…”

Mystery Sound Segment

• [10:16–11:49]

• Charis and Molly guess a sound (eventually revealed as a “swimsuit water extractor” at a pool—Charis gets it right!)

  “Charis, incredible work. High fives all around. That was really hard…” — Molly, 24:33

Mailbag

• [17:17–18:11]

• Listener Eda from NYC pitches a “pizza pool” room for Brains On HQ.

Memorable Quotes & Fun Facts

• “If you don’t keep your eye on the ball, you usually can’t hit it.” – Carys, 04:26
• “Babe Ruth—his nickname was the Bambino, which has nothing to do with eye black, but is just super fun to say.” – Sandon, 06:52
• “Blue eyes have less melanin. Maybe eye black can’t cut enough glare for them.” – Sandon, 09:10
• “It works because black paint absorbs light and stops it from reflecting back at you.” – Molly, 22:47

Important Timestamps

| Segment | Timestamp | |------------------------------------------------|----------------| | Show theme/introduction | 00:56–01:36 | | Host and co-host intro/softball talk | 03:03–04:21 | | Science of eye black | 05:00–10:11 | | Mystery sound (pool swimsuit extractor) | 10:16–11:49, 23:34–24:33 | | Science chants | 13:37–14:28 | | Bat measurement in ounces | 14:32–16:29 | | Mailbag (pizza pool room) | 17:17–18:11 | | Bat history/game: “Spot the Bogus Bat” | 18:20–22:17 | | Episode wrap summary (main questions) | 22:40–23:10 |

Episode Recap & Takeaways

• Eye black: Has ancient roots; intended to cut glare (with mixed scientific support), and makes players look intimidating (or like raccoons).
• Bats measured in ounces: For more precise, player-friendly measurements, since tiny differences in weight can make a big difference in swing and control.
• Bat history: Bats have come in all shapes and sizes, with some extremely odd (banana bat, zebra bat, axe handle bat).
• Sports and science: Whether it’s picking the right bat or fighting glare, sports are a showcase of cool science concepts in action!
• Listener engagement: The episode features lots of kid participation—questions, chants, and sound games—making it fun, interactive, and full of curiosity.

Final Memorable Moment

Molly sums it up:

“That’s it for this episode of Brains On… we’ll be back next week with more answers to your questions. Thanks for listening.” (27:14)

[End of summary]