The snowflake catcher: Snowflakes come in 121 types, and some you might see only once

"Every detail or pattern of a snowflake reflects what it goes through in the cloud. When falling to the ground, the snowflake must be unique. It's just like the humans - no two people can have identical experiences," said Zhang Chao, an enthusiastic fan of snowflakes.
Working at the National Astronomical Observatories (NAOC), Zhang often observes stars through a telescope. But he also enjoys using a microscope to see everything around him, from snowflakes to sand, which opens an amazing new world to him.
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Hi watching in Vietnam