New study with strong University of Arizona ties finds carbon dioxide has played a dominant role in controlling Earth’s temperature for nearly the last half-billion years.

Could advertising in fact be a more crucial piece of the puzzle than we’d realized ... apart from Facebook itself”. And if you’re not online and you don’t read the news, they’ll likely find you anyway ...

What is included in the Smithsonian magazine digital edition? The Smithsonian magazine digital edition includes all the editorial content and photos from the current print issue of Smithsonian ...

Here’s how the aerial acrobats are able to survive on a nearly all-sugar diet, fly higher than many helicopters can and migrate over the open ocean Bob Holmes, Knowable Magazine Everyone loves ...

Fortnitemares 2024 has unleashed Jigsaw's Challenge on the Fortnite island and it throws you into a high stakes duel.

We Build a Barn, Got Stuck in the MUD and Shot a nice Buck! The MOST Action Packed weekend ever!

Nobody knows you can do this with a jigsaw! Hidden Features of Jigsaw ...

The National Museum of American History's online exhibition American Democracy ... History Vote Button National Museum of American History Vote Cooper Hewitt, Smithsonian Design Museum Vote National ...

This week’s jigsaw puzzle features a photo from the Graceland Soundstage and shows the crowd to see Elvis' granddaughter, ...

Please fill in your full name, email address, residential address and phone number along with your answers to the puzzles you wish to enter. -You can only enter once online for each issue.

Please fill in your full name, email address, residential address and phone number along with your answers to the puzzles you wish to enter. -You can only enter once online for each issue.

A new lineup of comics and puzzles debuts Saturday in the Arizona Daily Star and on Tucson.com — and we’re thrilled to have you take a look. You’ll notice our refreshed menu includes ...