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Mathevon et al. 2017

A new study found male northern elephant seals produce signature rhythmic calls to communicate with their rivals — and navigate their social network.

Why it matters: These are the only non-human mammals known to use rhythm, and the evolution of this type of communication in other species helps to better understand the origins of music among humans.

How they use it: Nicolas Mathevon, one of the study's authors from Université de Lyon/Saint-Etienne in France, said elephant seals "fight [for females] very violently, even to the point of killing one another." Recognizing competitors by the rhythm in their voice allows them to "choose the right strategy" when confronting a rival during mating.

Yes, but... seals most likely use "a multitude of factors to identify each other in a group," not just their calls, according to Caroline Casey, a PhD candidate at the University of California Stanford who participated in the study.

What comes next: Casey said the team is "in the process of tracking young elephant seals throughout their vocal development to see how these individual signatures emerge over time."

Go deeper

Axios AM Deep Dive: Pandemic eating

Illustration: Sarah Grillo/Axios

A food revolution began pre-pandemic and COVID has only accelerated that. See how America's food industry is transforming, from farm to your table.

Abrams’ campaign manager rules out 2024 run if she wins governor's race

Photo: Jessica McGowan/Getty Images

In her first major interview since the official announcement, Stacey Abrams' campaign manager Lauren Groh-Wargo quashed speculation that the Georgia Democrat would interrupt a theoretical gubernatorial term to run for president in 2024.

Why it matters: Abrams' name has come up repeatedly as a top 2024 Democratic contender given President Joe Biden's age and Vice President Kamala Harris's low favorability rating.

Dan Primack, author of Pro Rata
Updated 1 hour ago - Politics & Policy

Trump social media group raises $1 billion from undisclosed investors

Illustration: Sarah Grillo/Axios

Donald Trump's social media startup on Saturday announced that it secured $1 billion in new investment as part of its ongoing efforts to become publicly traded via a blank check company.

Between the lines: None of the investors were identified, which is highly unusual for this sort of transaction.