Awesome topics from NATIONAL GEOGRAPHIC KIDS

NATGEOKIDS

Author

Nobukuni Hyakutake

Published

2023-10-22

1 Colorful caves

What do you get when geothermal hot springs carve a long channel beneath¹ heavy snow compressed into ice? Ice caves! Inside, variations in ice thickness refract² light differently, revealing a full spectrum of colors (thicker ice appears blue or green). But don’t linger³ too long - ice caves can collapse at any time.

1.1 References

NATIONAL GEOGRAPHIC KIDS - February 2022

Footnotes

真下に↩︎
屈折させる↩︎
長居する↩︎

---
title: "Awesome topics from NATIONAL GEOGRAPHIC KIDS"
author: "Nobukuni Hyakutake"
date: "2023-10-22"
date-format: "iso"
categories: [NATGEOKIDS]
image: "aragonite.jpeg"
---

![](aragonite.jpeg)

# Colorful caves

- What do you get when geothermal hot springs carve a long channel beneath^[真下に] heavy snow compressed into ice? Ice caves! Inside, variations in ice thickness refract^[屈折させる] light differently, revealing a full spectrum of colors (thicker ice appears blue or green). But don't linger^[長居する] too long - ice caves can collapse at any time.

## References

[NATIONAL GEOGRAPHIC KIDS](https://kids.nationalgeographic.com/) - February 2022