The Conversation

Tick season is in full swing across much of North America – blacklegged ticks, dog ticks, lone star ticks and others are out there. And some of these tiny blood-suckers are carrying diseases that you do not want.

But are ticks entirely to blame for how they spread disease?

Sean Lawrence, an environmental historian at West Virginia University, explains how human behaviors have exacerbated the spread of tick-borne diseases.

If you’ve ever wondered how a tick holds on once it bites down, Lawrence has a photo explaining that, too.

Also in this week’s science news:

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Stacy Morford

Senior Environment, Climate and Energy Editor

The black-legged tick, or deer tick, Ixodes scapularis, can transmit Lyme disease and other health hazards. U.S. Centers for Disease Control and Prevention

Ticks carry decades of history in each troublesome bite

Sean Lawrence, West Virginia University

Changes to forests, and how close people and their livestock live to them, have changed tick habitats and the risks humans face of Lyme disease and other illnesses.

Snow leopards are hard to find and count, which makes protecting them difficult. zahoor salmi/Moment via Getty Images

AI helps tell snow leopards apart, improving population counts for these majestic mountain predators

Eve Bohnett, University of Florida

Conservationists have to search rough terrain and thousands of automated photographs to find the elusive cats. Artificial intelligence can help them work more accurately and more efficiently.

This screenshot of an AI-generated video depicts Christopher Pelkey, who was killed in 2021. Screenshot: Stacey Wales/YouTube

AI ‘reanimations’: Making facsimiles of the dead raises ethical quandaries

Nir Eisikovits, UMass Boston; Daniel J. Feldman, UMass Boston

AI avatars of dead people are teaching courses and testifying in court. Even with the best of intentions, the emerging practice of AI ‘reanimations’ is an ethical quagmire.

Sleep loss rewires the brain for cravings and weight gain – a neurologist explains the science behind the cycle

Joanna Fong-Isariyawongse, University of Pittsburgh

Even one night of inadequate sleep can shift your hunger into overdrive, setting off a chain reaction in the brain. But one or two nights of solid sleep can help reset metabolism.

Is Mars really red? A physicist explains the planet’s reddish hue and why it looks different to some telescopes

David Joffe, Kennesaw State University

Mars isn’t a bright, fire-engine red, but the iron oxide in its rocks makes it appear redder than other planets, especially from afar.

RNA has newly identified role: Repairing serious DNA damage to maintain the genome

Francesca Storici, Georgia Institute of Technology

Researchers discovered a previously unknown function of RNA, potentially opening the door to new ways to treat cancer and neurodegenerative diseases.

Nostalgic foods and scents like fresh-cut grass and hamburgers grilling bring comfort, connection and well-being

Chelsea Reid, College of Charleston

Once thought to be an unhealthy experience, researchers now know that feelings of nostalgia can promote greater social connectedness and a deeper sense of meaning and purpose.