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ND Filters Explained - In depth Guide for Beginners

ND Filters Explained - In depth Guide for Beginners

In this tutorial, I’m going to explain all about ND filters in photography; what ND filters do, what ND filters to buy, what effects they create and so on. If you’re thinking of buying or using ND filters to create long exposure photography, then this tutorial is for you.
This low-tech terrarium purifies water like a mini-Amazon rainforest (Video)

This low-tech terrarium purifies water like a mini-Amazon rainforest (Video)

Emulating the same processes naturally found in rainforests, this prototype filters and cleans water of harmful pollutants.
13 Year Old Invents A Water Purifier Made Out of Corn Cobs

13 Year Old Invents A Water Purifier Made Out of Corn Cobs

Lalita Prasida Sripada Srisai in 9th grade, attending DPS Damanjodi, a school in a small town in the Koraput district in the Indian state of Odisha. She won the 'Community Impact Award’ at the Google Science Fair for her incredible invention
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