Hosted by Sandra Tsing Loh, The Loh Down on Science is a fun way to get your daily dose of science plus a dash of humor in less than two minutes.
Hosted by Sandra Tsing Loh
Airs Weekdays 2:43 and 3:43 a.m.

Champion Swimmers





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If you can’t stand the heat, get out of the…ocean?!?

This is Sandra Tsing Loh with the Loh Down on Science 

We know ocean temperatures change. But exactly how does that affect fish?

Enter researchers at McMaster and St. Andrew’s Universities. Specifically, they investigated how early exposure to heat would affect fish swim power. 

Scientists focused their attention on the humble zebrafish to learn more. Groups of embryos were separated into water of different temperatures: cold, neutral, and hot. After hatching, these fish were all raised into maturity at the neutral temperature. 

To see which group was the aquatic all-star, the researchers conducted a swim test. How well could each group swim in the different water temperatures? 

The results were surprising! Fish embryos raised in hot water became the strongest swimmers in ALL temperatures. A closer look revealed that these fish also had the most adaptable muscle tissues. 

So instead of training in cold swimming pools, Olympic athletes should sink into nice warm baths. That’s what I’d do. Ahhhhh!