Regular water-changes are essential to the wellbeing of aquarium fish, but the task sometimes gets missed, plus it can be hard to determine how much water should be replaced, and how often.

At $1,545, the new Kahki Navy Scuba Automatic GMT is an incredible bargain for a bronze dive watch. Hamilton. Considering that the new Scuba GMT is more preferable for travel and boasts triple the ...

This article was originally published with the title “ An Automatic and Non-Freezing Stock Watering Trough ” in Scientific American Magazine Vol. 54 No. 2 (January 1886), p. 18 doi:10.1038 ...