Watch Weevils Invade California Palm Trees

Josh Cassidy/KQED
Josh Cassidy/KQED

California is known for its palm trees. Though it only has one native palm species—the rest are imported—the carefully trimmed trees are an instant visual that reads "paradise." Sadly, some palms are now being eaten by weevils.

The South American palm weevil is a big lumpy beetle with a mission: burrow into palm trees and lay eggs. They favor the Canary Island date palm, sometimes called the "pineapple palm" referring to its distinctive shape after pruning.

Female palm weevils drill into the apical meristem ("heart of palm" to foodies) to lay eggs. The newly hatched weevils start life in a bountiful environment, surrounded by food and water. They eat the trees' heart out, leaving a mushy ruin in their wake. Then the larvae proceed with their lifecycle, maturing inside cocoons they make from leftover palm fibers. When they hatch and fly on, the cycle repeats.

This slow escape can kill the tree, as the apical meristem is where the tree sprouts new leaves. In many cases the weevils leave the tree in a state of severe injury, with a characteristic wilt to its existing leaves.

Finding these weevils isn't easy—once they've burrowed in, they're basically undetectable until the damage is done. The current best practice for preventing their spread is to treat palm trees with anti-weevil pesticides. As the weevils begin to invade San Diego, scientists are tracking their spread.

In the video below, Deep Look gets up close with these palm weevils and the scientists studying them. This was shot in 4K Ultra HD, so you can see the creepy little bugs in all their H. R. Giger-style glory.

If video isn't your thing—or you just want more discussion of the science—read this KQED Science blog post.

There Could Be Hundreds of Frozen Corpses Buried Beneath Antarctica's Snow and Ice

Prpix.com.au/Getty Images
Prpix.com.au/Getty Images

Scientists and explorers take a number of risks when they travel to Antarctica. One of the more macabre gambles is that they'll perish during their mission, and their bodies will never be recovered. According to the BBC, hundreds of frozen corpses may be trapped beneath layers and layers of Antarctic snow and ice.

“Some are discovered decades or more than a century later,” Martha Henriques writes for the BBC series Frozen Continent. “But many that were lost will never be found, buried so deep in ice sheets or crevasses that they will never emerge—or they are headed out towards the sea within creeping glaciers and calving ice.”

In the world’s most extreme regions, this is not uncommon. For comparison, some estimates suggest that more than 200 bodies remain on Mt. Everest. Antarctica's icy terrain is rugged and dangerous. Massive crevasses—some concealed by snow—measure hundreds of feet deep and pose a particularly serious threat for anyone crossing them on foot or by dogsled. There’s also the extreme weather: Antarctica is the coldest, driest, and windiest place on Earth, yet scientists recently discovered hundreds of mummified penguins that they believe died centuries ago from unusually heavy snow and rain.

One of the most famous cases of a left-behind body on Antarctica dates back to the British Antarctic Expedition (also known as the Terra Nova Expedition) of 1910 to 1913. British explorer Robert Falcon Scott and his four-man team hoped to be the first ones to reach the South Pole in 1912, but were bitterly disappointed when they arrived and learned that the Norwegian explorer Roald Amundsen had beaten them to it.

On the return trip, Scott and his companions died of exposure and starvation while trapped by a blizzard in their tent, just 11 miles from a food depot. Two of those bodies were never found, but the others (including Scott’s) were located a few months after their deaths. Members of the search party covered their bodies in the tent with snow and left them there. The bodies have since travelled miles from their original location, as the ice grows and shifts around them.

Other evidence suggests people landed on Antarctica decades before Scott’s team did. A 175-year-old human skull and femur found on Antarctica’s Livingston Island were identified as the remains of a young indigenous Chilean woman. No one yet knows how she got there.

Accidents still happen: After coming close to completing the first solo, unaided traverse of Antarctica, British adventurer Henry Worsley died of organ failure following an airlift from the continent in 2016. Most modern-day polar visitors, however, have learned from past missteps.

[h/t BBC]

How Waffle House Helps Measure the Severity of a Natural Disaster

iStock
iStock

There are a lot of ways the Federal Emergency Management Agency (FEMA) assesses and addresses the severity of a natural disaster. Meteorology can predict movement patterns, wind gusts, and precipitation. Resources are dispatched to areas hit hardest by torrential weather.

But when the agency needs an accurate, ground-level gauge for how a community is coping during a crisis, they turn to Waffle House.

Since 2004, FEMA has utilized what former administrator Craig Fugate called the “Waffle House Index.” Because the casual dining chain is open 24 hours a day, seven days a week, tracking to see if a location is closed or working with limited supplies can help inform the agency as to whether affected areas are ailing or taking steps toward normalcy.

“If a Waffle House is closed because there's a disaster, it's bad,” Fugate told NPR in 2011. “We call it red. If they're open but have a limited menu, that's yellow ... If they're green, we're good, keep going. You haven't found the bad stuff yet.”

For FEMA, the ability to order a plate of smothered and covered hash browns is an important analytic. If a Waffle House is having trouble getting stock, then transportation has been interrupted. If the menu is limited, then it’s possible they have some utilities but not others. If its locations have locked their doors, inclement weather has taken over. The chain’s locations would normally stay open even in severe conditions to help first responders.

The company has opened a Waffle House Storm Center to gather data in anticipation of Hurricane Florence, a Category 2 storm expected to touch down in the Carolinas this week. But not all locations are taking a wait-and-see approach. One Waffle House in Myrtle Beach, South Carolina has already closed due to the looming threat, making it the first red dot on the Index.

[h/t CNN]

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