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.

These Hoodies Are Made From Recycled Plastic Bottles and Used Coffee Grounds


Sustainable fashion is getting creative. Different manufacturers have made “leather” out of everything from mushrooms to pineapples, as well as an environmentally-friendly fabric derived from banana peels. Now, drawstring hoodies made from used coffee grounds and recycled plastic bottles are hitting the market.

The Evolution Hoodie is the latest product from Coalatree, a Salt Lake City-based company that specializes in goods made from sustainably sourced materials. To create this hoodie, employees typically collect used coffee grounds from local shops on their way into work. Next, they dry the coffee, remove the oils, grind the grounds into smaller particles, then mix it with the melted plastic bottles to create a type of yarn.

More specifically, each hoodie is made from three cups of coffee and 10 plastic bottles. And in case you were wondering: it doesn’t smell like coffee (which may be a good or bad thing, depending on your personal tastes).

The hoodie is ideal for those who want to incorporate more eco-friendly products into their lives, and Coalatree's clothes are designed with active, outdoorsy types in mind. (Outside magazine, for instance, called Coalatree’s Trailheads the “best hiking pants.”) Its lightweight, quick-dry fabric and UV ray protection make it suitable for a number of outdoor activities, such as hiking, biking, or kayaking.

With a pickpocket-proof zippered pouch to store your things, as well as a loop to clip your keys onto, it’s also travel-approved. If you get hot, you can take the hoodie off and fold it up into its own pocket, transforming it into a makeshift travel pillow. The hoodie is currently available in a few colors, including oatmeal, black, maroon, and green.

Buy it on Kickstarter for $62.

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The Northern Lights May be Visible in New York, Michigan, and Illinois on Saturday

The Northern Lights, a meteorological event most common to areas north of the Arctic Circle, may be visible over parts of America this weekend, Newsweek reports. Due to a solar storm, the light show may appear Saturday night over states in the northern part of the contiguous U.S., including New York, Michigan, Illinois, and Washington state.

Aurora borealis, or the Northern Lights, occur when solar particles react to gases in Earth's atmosphere. Magnetic energy exaggerates this effect, which is why auroras most often appear at the geomagnetic poles where Earth's magnetic field is strongest. Rare circumstances can produce this phenomenon at lower latitudes, which may be the case this weekend.

On Wednesday, March 20, a solar flare sent a blast of solar particles toward Earth. The resulting geomagnetic storm could make for a vibrant and colorful aurora reaching as far south as New York and Wisconsin.

To catch the spectacle, look up at the night sky on Saturday, March 23. People in areas with minimal light pollution have the best chance of seeing the Northern Lights, though cloudy weather may make them hard to see.

[h/t Newsweek]