ants

Spanish Military Tests Swarm Intelligence on Video Game Battlefield

The Spanish army is using ant colony algorithms to plot the best paths through future battlefields

Moving through real-life battlefields inevitably proves trickier than playing a game of Minesweeper, but Spanish researchers and army officers have converted the video game Panzer General into a simulator that can test troop maneuver algorithms based on ant colony behavior.

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Color-Coded Ants Reveal their Efficiency


Artful Insects: Biologist Anna Dornhaus color-coded 1,200 ants using paint to identify individuals and set them on various tasks.  Photograph by Alex Wild

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The Sex Files

The Pros and Cons of Asexual Reproduction

Opposite-sex partners: can't live with 'em, can't evolve without 'em

Making babies requires a male and a female, a sperm and an egg, right? Well, the wild world of animals is often more creative than the lot of us humans when it comes to making whoopee. In fact, some animals don't have sex at all, thank you very much.

Just this month, bug biologists found the first all-female ant species, Mycocepurus smithii. The queen ant clones herself by making eggs that develop into adult females without fertilization. Some of those females will then become queens themselves. Apparently the species has been sexless for enough generations that the ants might not be able to mate even if they wanted to. Dissections showed that a key female sex part that normally interlocks with a male organ during mating had shrunken to a ghost of its former self.

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Missing Links

A Spicy Meal

Ants, minus the venom

Also in today's links: pregnant whales giving birth on land, mice living the good life, and more.

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Missing Links

When the Ants Go Marching In

We want to be in that number

Ants, plus good news for commuters, polluters, and more, in today's link collection.

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Newest Ant Species is Has Oldest Ancestors

A new blind, predatory, subterranean ant species with ancestral roots dating back to more than 120 million years ago spurs a debate on the evolution of ants.

Sometimes the smallest discovery lends itself to the biggest insight. That certainly was the case for University of Texas at Austin graduate student Christian Rabeling, who found a new ant species in the Amazon that is likely the descendent of one of the first ants to evolve on Earth more than 120 million years ago.

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Crazy Rasberry Ants

An unknown species of ant is wrecking havoc in Texas

First came the killer bees and now comes the crazy ants. Houston is home to a new invasive species of ant, thought to have arrived via a container ship in 2002. The as-of-yet unidentified species is colloquially referred to as the crazy rasberry ant for its erratic foraging habits, appearing to dart in every direction but straight ahead. The ant has quickly become a nuisance both to the local ecology and to the people living with them. They are omivorous and will eat everything from flora to other insects and even the hatchlings of a local grouse called the prarie chicken.

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Turning an Ant Into a Berry

A worm that invades its host's belly to make it look more edible proves an unusual parasite

Cephalotes Atratus Ant: As the worms lay their eggs inside the ant, it's gaster is stretched until it resembles a berry that's attractive to birds.  Stephen P. Yanoviak
Parasites are well known to have evolved an exceptional array of strategies for perpetuating themselves. A microscopic tropical nematode worm which lives in the gasters of ants in Panama is one of the more impressive. Researchers at the University of Arkansas have recently illuminated its method, which manages to make the ant appear to be a fruit so that it will be eaten by birds.

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December 2009: Best of What's New

In our December issue, Popular Science names the 100 best innovations of the year: bombproof wallpaper, self-parking cars, the fastest helicopter, and 97 more. Plus inventor profiles and videos.

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