Mon Prof Augmenté
Warm Sand Nest
A buried clutch of eggs rests in a flask-shaped chamber under the sand. The sand near the middle is warmer than the sand near the outer edge.
This picture is part of the full library
Every lesson is open to everyone for 7 days after it is published. This one came out on September 13, 2026: its text stays readable here, and its picture opens with a subscription.
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Age 12: open this week
Browse Age 12
In the picture
- Central lower egg
- Outer upper egg
- Middle thermometer
- Rim thermometer
Examples
- A sea turtle nest on a beach
- A sun-warmed sand pit
Key takeaways
- Sand temperature can decide whether an egg becomes male or female.
- Eggs near the middle of a nest are warmer than eggs at the edge.
Carry on in the app
Three questions on this lesson. It has left the free week, so its quiz is for subscribers.
At least one new illustrated lesson every weekday for your child’s year, with its quiz and a reminder at 6:15 pm.
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