Search Results for: Invertebrate
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698 results
- Earth
Mapping watersheds invites comparisons
Computerized maps of environmental features for 154 of the largest river watersheds will soon be available to the public, free of charge.
- Earth
Dead Waters
Coastal dead zones—underwater regions where oxygen concentrations are too low for fish to survive—are mushrooming globally, threatening to transform entire ecosystems.
- Animals
Hooking the Gullible
Research into fish behavior often reveals ways that bait designers can trick a fish into biting odd-looking lures, but angler appeal can also be an important marketing consideration.
- Ecosystems
Why didn’t the beetle cross the road?
Beetle populations confined to specific forest areas by roads seem to have lost some of their genetic diversity.
- Animals
Stalking Larvae: How an ancient sea creature grows up
Scientists have finally observed living larvae of a sea lily, an ancient marine invertebrate related to starfish.
- Paleontology
L.A.’s Oldest Tourist Trap
Modern excavations at the La Brea tar pits are revealing a wealth of information about local food chains during recent ice ages, as well as details about what happened to trapped animals in their final hours.
- Health & Medicine
First Line of Defense: Hints of primitive antibodies
After looking in primitive marine invertebrates that are considered to be close relatives to vertebrates, immunologists find families of genes that might provide clues as to how early immune systems evolved.
- Paleontology
Was it sudden death for the Permian period?
The massive extinctions that came at the end of the Permian period could have occurred within a mere 8,000 years, which suggests a catastrophic cause for the die-offs.
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Sea squirt’s DNA makes a splash
The DNA sequence of a sea squirt may reveal the origins of vertebrates.
- Animals
Ant Traffic Flow: Raiding swarms with few rules avoid gridlock
The 200,000 virtually blind army ants using a single trail to swarm out to a raid and return home with the booty naturally develop three traffic lanes, and a study now shows that simple individual behavior makes the pattern.
- Animals
Ant Traffic Flow: Raiding swarms with few rules avoid gridlock
The 200,000 virtually blind army ants using a single trail to swarm out to a raid and return home with the booty naturally develop three traffic lanes, and a study now shows that simple individual behavior makes the pattern.
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Evolution may not be slow or random
Studies of fruit flies taking over the New World and stickleback fish adapting to Canadian lakes suggest that evolution can proceed quickly and take predictable paths.
