Season 8 Episode 4: Teen Sleep, Mushing Dogs, and Dr. Alex Dainis on Tasting Every Single Amino Acid

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Seventy thousand digits of pi is impressive, but the number that stuck with us is much scarier: about one in four high school students now reports sleeping five hours or less. We dig into the latest teen sleep deprivation data, what it means for learning, mental health, and emotional regulation, and why “just go to bed earlier” ignores adolescent circadian rhythm biology. When melatonin shifts later during puberty, early school start times can become a daily clash between the clock and the teen brain.

From there we head outdoors for pet science, exploring dog sledding and mushing through a surprising lens. A survey-based study from the Czech Republic frames mushing as a human-dog partnership shaped by empathy, ecology, and even spirituality. We connect those ideas to the Iditarod, its roots in the 1925 serum run, the extreme athletic demands placed on sled dogs, and the real ethical questions that come with a dangerous sport people feel deeply about.

Our Ask An Expert guest is Dr. Alex Dainis, a geneticist and science communicator who makes biochemistry unforgettable by taste testing amino acids, the building blocks of proteins. We talk sweet glycine, candy-like lysine, sulfur-packed cysteine, and why showing the process of science matters as much as the results. Alex also shares how ACS Reactions builds curiosity by running experiments where nobody knows the outcome at the start, plus her strongest argument for using honest uncertainty in science communication.

If you like science news, practical context, and a few weird facts you’ll repeat to your friends, hit play. Subscribe, share this with a fellow science lover, and leave a review telling us what topic you want us to tackle next.

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