Their coloration can be similar, including shades of grey, white, and brown ... Distinguishing between rat and mouse droppings can help with identification. Brown rat droppings are dark brown ...

a mouse has a triangular-shaped nose, and a rat’s nose is more rounded, wider and blunt. Generally, mice and rats can be brown or gray in color, but rats can also be black. It’s always ...

The mice were created by Colossal Biosciences, which edits DNA for species conservation, and has been working to bring back the woolly mammoth since 2021.