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A dog carving found on a cliff in M.Guagnin. Credit: Journal of Anthropological Archaeology, 2017

Ancient sandstone engravings found in the Arabian desert depict dogs wearing leashes, according to a paper published Thursday in the Journal of Anthropological Archaeology and reported by David Grimm at Science.

Why it matters: It's difficult to date these carvings, but "based on the sequence of carving, the weathering of the rock, and the timing of switch to pastoralism" the pictures are likely 8,000-9,000 years old, writes Grimm, who notes that this would make them the oldest known depictions of dogs.

Modern resemblance: The dogs depicted have curly tails, like the Canaan dogs that live in the Middle East today.

Yes, but before the age of these engravings can be confirmed, they'll need to be tied to a well-dated archaeological site. Melinda Zeder, an archaeologist at the Smithsonian Institute of Natural History tells Grimm doing so could be difficult because "the archaeological record in this region is really spotty." Even if these aren't the oldest dog depictions we've found, they're definitely the oldest of leashes.

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The Food and Drug Administration's staff released a briefing document on Wednesday endorsing Johnson & Johnson's one-shot coronavirus vaccine as safe and effective.

The latest: Assuming the FDA issues an emergency use authorization "without delay," meaning as soon as this weekend, White House coronavirus coordinator Jeff Zients said J&J will have 3 million to 4 million ready for distribution next week.

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Biden and Netanyahu in Jerusalem in 2016. Photo: Debbie Hill/AFP via Getty

The United States and Israel have elected to reconvene a strategic working group on Iran, with the first round of talks on intelligence surrounding the Iranian nuclear program expected in the coming days, Axios has learned.

Why it matters: President Biden and Israeli Prime Minister Benjamin Netanyahu have sharply contrasting views of the 2015 Iran nuclear deal, but the resumption of the working group is a signal that their governments are starting with a serious and professional dialogue rather than a political fight.