Quick – which of these lines is longer?
If you’re reading this, you’re taking too long to answer the question.
If you said the one on the right, congratulations! You’re wrong, of course, but your brain is working perfectly well. This is an example of an optical illusion, an image specifically created to trick your brain. You probably saw a lot of these as a kid, and you may have even thought they were fun. I know I did. I remember finding optical illusions in books, learning about the trick, and then quizzing classmates about them (I was a strange kid). I got satisfaction from knowing the trick to the picture, especially when others couldn’t see the illusion.
Once I got through graduate school, though, I realized that there are a lot of times where knowing the trick just brings up more questions. For example, let’s look at those lines again:
Yup, still lines.
The right one still looks longer, right? But we absolutely know that these lines are the same length! That’s why, to me, the big question is this:
Why does the illusion still work, even after we know the trick?
I want to share a personal perspective. I’ve lived my whole life caring for pets: cats, turtles, frogs, a praying mantis I found in the backyard. I wrote a rock opera about my sister’s hamster. In my professional life, I work with zebrafish for research. In short, I’m a vegetarian who believes strongly in the ethics of animal research. In this column I want to share stories of working with animals, its joys and frustrations, and pay some small tribute to the animal lives that make it possible for me to live so long, and in such extraordinary health.
Working with animals can be emotionally hard. Sometimes it’s hard even to watch, the way surgery is hard to watch – a part of me knows the higher purpose, another part has a hard time ignoring a knife that cuts into a person’s chest. In the same way, in research, I see the kindred spark of life in every mouse I’ve ever held, and when they pass through that thin boundary between living and dead, I feel it. Here’s why I keep doing it: Continue reading