We often use ‘eldest’ and ‘oldest’ interchangeably, but the words shouldn’t be swapped out so easily. Here's how to use each.

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The period of scientific, artistic, and political revolutions isn’t known as the “Age of Reason” for nothing.
The best gifts for commuters make your loved one’s journey to work something they’ll look forward to.
In this 11-minute video, woodworker Frank Howarth makes what he calls an “inside-out Christmas ornament,” complete with a mini-Christmas tree inside.
Some people can drink a lot of wine without ill effect. Others are on the couch after a glass. Science might know why.
Charlemagne built one of the greatest empires in world history, but less than a century after his death, it was gone.
Watch up close as one Cape sundew plant uses its tentacles to trap and entomb an insect.
The magazine has named the most newsworthy subjects annually for the past century, with a few surprises.
Just a whiff of Krasnaya Moskva (Красная Москва, or “Red Moscow” in English) is enough to transport Russian citizens to the nostalgia of their childhoods.
The bootleg chocolate bars are prompting health and safety concerns.
Most contractions in English are pretty straightforward. Put it together, and shorten it up. But that isn't the case for ‘will not.’
With Prohibition—which ran from January 17, 1920, to December 5, 1933—came language to describe everything from drinking establishments to the people who made booze to booze itself.
From 'King Kong' to 'Titanic,' these famous movie quotes often get muddled in the retelling.
McNugget Buddies are back in action, but these Happy Meals won't last forever.
This comforting butternut squash soup from the Institute of Culinary Education is the perfect way to celebrate the last gasps of autumn.
They may be famous for their aviation feats, but the brothers also made a foray into the bicycle business.
While the club initially formed as a social group for writers of detective fiction, it did have an official purpose: to uphold a rigid set of standards for crime fiction, and weed out any potential members who wouldn’t agree to meet them.
Social media is changing language again.
Buying for a DIY enthusiast doesn't have to be hard. Check out our gift suggestions for someone who likes working with their hands.