Quiz: Do You Know Your Groundhogs?

Groundhog Day may be the one day of the year that you give the Marmota monax much thought. For example, did you know that a young groundhog is sometimes called a chuckling? How about that the groundhog is a rodent in the ground squirrel family? Show us your Punxsutawney genius by identifying the groundhogs in the following pictures from the New York Public Library Digital Collection.

Quiz: Do You Know Your Groundhogs?

Study proposes explanation for how cephalopods see color, despite black and white vision


Cephalopods probably detect color by adjusting their eyes to detect different wavelengths of light, and then composite each into a “color” image of their world.

Study proposes explanation for how cephalopods see color, despite black and white vision


It’s 3 a.m. and Whiskers has decided it’s time for breakfast. He jumps up on your bed, gently paws at your eyelids and meows to be fed. Annoyed? Cat behavior specialist Sarah Ellis says you have only yourself to blame.

Ellis says that cat owners reinforce negative behaviors when they give into them. “Cats are not necessarily born meowing and screaming at us for food, it’s a behavior that they learned,” Ellis tells Fresh Air’s Terry Gross.

Instead of indulging Whiskers’ request for an early-morning snack, Ellis recommends adopting an “extinction schedule,” whereby you ignore the behavior entirely until it stops. If cat owners “can be really strong with that extinction schedule and just make sure at every occurrence of that behavior they do not reward it… it will stop,” Ellis says.

In her book, The Trainable Cat, Ellis and her co-author John Bradshaw describe how humans who understand basic feline nature can get their cats to come on command, take medicine and, yes, wait until morning for breakfast.

When it comes to encouraging the positive, Ellis recommends rewards over punishment — especially if the rewards are intermittent. “You don’t give a reward every single time,” Ellis explains. “This sort of keeps the cat guessing, they don’t know if running toward you this time will get the food or it’ll be the next time, and that actually makes the behavior more likely to happen.”

Who Says You Can’t Train A Cat? A Book Of Tips For Feline-Human Harmony