travel-mugs 
Academy of Natural Sciences
NOVEMBER 23, 2021
A dino-shaped popper fidget toy perfect to keep your young cousins occupied during holiday travels. . An illustrated geologic time mug for your favorite nerd. . A plush velociraptor for your Jurassic Park obsessed child. . A hangry T. rex shirt for that loved one who always needs an extra granola bar. .
Physics World
MAY 5, 2022
In this framework, a circle is topologically equivalent to an ellipse, and a doughnut equivalent to a coffee mug, because these pairs of objects can be deformed into each other by stretching. In contrast, a doughnut cannot be deformed into a ball without ripping it apart because of the hole at its centre.
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Physics World
JUNE 5, 2021
Similarly, a mug and a doughnut are topologically identical, if defined by the existence of a single hole. When a magnetic field is applied, the electrons in the 2D layer experience a perpendicular Lorentz force and begin to travel in tiny circles, similar to the orbits of bound electrons around atoms.
Academy of Natural Sciences
JUNE 2, 2022
While it travels, the water picks up contaminants, trash and pollutants and carries it all to the nearest body of water. Thankfully, this problem has an easy fix: simply consider a reusable mug or cup and drink filtered tap instead. …And where it goes, too. . Plant some plants. . A single acre of wetlands can hold up to 1.5
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