Science is Hot
Pop quiz: A liquid's density changes in proportion to its what? C: (always choose C) Temperature. You can thank Galileo for that discovery—one that was so cool someone turned it into a thermometer. Colorful glass bulbs in different weights rise or sink when the temperature of the room (and the liquid) changes, creating subtle lava lamp-style movement. They also feature tags for both Fahrenheit and Celsius. While most versions of this thermometer are cylindrical, this design is circular and sits on a handsome wood base, making it a distinct desktop conversation starter. Made in China.