Episode Details

Scientists Found The Biggest Known Plant On Earth

This week, an underwater seagrass meadow claimed the title for the world’s largest plant. This organism sprawls across 77 square miles of shallow ocean and has survived 4,500 years. To accomplish this, it kept cloning itself and created identical offshoots to spread along the sand. The ocean has changed wildly over the last 4,500 years, yet this plant has survived.

Researchers believe that cloning itself may have helped the plant adapt to a changing ocean, offering hope that seagrass meadows may be more resilient than expected in the face of climate change.

Sophie Bushwick, a technology editor at Scientific American, joins Ira to talk about how this mighty meadow persisted for millennia and what it tells scientists about climate change.

Sophie and Ira also discuss other stories from this week in science, including what countries are most responsible for fueling the extinction of wildlife, what a well-preserved fossil tell us about the sex lives of ancient trilobites, why male mice are terrified of bananas, the creation of a flea-sized robot that walks like a crab, and how scientists developed an algorithm to pinpoint the whereabouts of unknown asteroids.

 

Building A Better Battery… Using Plastic?

The lithium-ion battery in your cell phone, laptop, or electric car is a crucial component of the modern world. These batteries can charge quickly, and pack a lot of power into a small space. But they’re also expensive, require mining scarce lithium, and need to be handled carefully.

Other battery technologies have issues as well. For example, the heavy lead-acid battery that starts your car is quite reliable—but lead has its own environmental and health costs. That’s why PolyJoule, a startup company based near Boston, is trying to create a new kind of battery, somewhere on the performance curve between those old lead-acid batteries and lithium-ion cells. Their technology relies not on a metal, but on polymer plastics.

Read more at sciencefriday.com.

 

Bug Off: Why Mosquitoes Have An Annoyingly Amazing Sense Of Smell

Mosquitoes use their sense of smell to find their next meal: us. So what would happen if you tweaked their smell so that humans smell really gross to them?

That’s what Dr. Chris Potter and his lab recently tried to do—they changed the neurons responsible for the insect’s smell detection, so that in the presence of animal odors, their olfactory systems would be overwhelmed. Instead of smelling like a nice meal, mosquitoes would be repelled by the scent of humans, like if you were stuck in a small room with someone wearing too much cologne.

This method worked in Drosophila, the common fruit fly, so Potter and his team were hopeful that would also be the case for mosquitoes. Instead, the experiment didn’t go as planned. Because finding a blood meal is so important for mosquitoes, those little buggers evolved backups for their backup receptors. When Potter turned one pathway off, another one kicked in.

Ira talks with Dr. Chris Potter, an associate professor of neuroscience in the Johns Hopkins University School of Medicine, based in Baltimore, Maryland, about his findings, and why we can never quite get mosquitoes to bug off.

 

So You Think You Know About Sex

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