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A Tale of (More Than) Two Butterflies

By Guest PostSeptember 14, 2011Nature, Scienceappalachian mountains, appalachian tiger, appalachian tiger swallowtail, battus philenor, canadian tiger swallowtail, canadian tigers, diversity of life on earth, eastern tiger, eastern tiger swallowtail, harvard university, hybrid speciation, krushnamegh kunte, larry gilbert, marcus kronforst, north american tiger swallowtail butterflies, p canadensis, p glaucus, papilio appalachiensis, pipevine swallowtail, poisonous butterfly, sam scheiner, tiger swallowtail butterfly, tom juenger, university of texas at austin

*Appalachian tiger swallowtail butterfly is hybrid of other swallowtails*

Flitting among the cool slopes of the Appalachian Mountains is a tiger swallowtail butterfly that evolved when two other species of swallowtails hybridized long ago.

It’s a rarity in the animal world, biologists have found.

They discovered that the Appalachian tiger swallowtail, Papilio appalachiensis, evolved from mixing between the Eastern tiger swallowtail, P. glaucus, and the Canadian tiger swallowtail, P. canadensis. (more…)

New Map Reveals Giant Fjords Beneath East Antarctic Ice Sheet

By Guest PostJune 4, 2011Environmentairborne geophysical instruments, antarctic ice sheet, Antarctica, aurora subglacial basin, australia, computer modelers, dc 3 aircraft, donald blankenship, duncan young, earth, east antarctic ice sheet, east antarctica, fjords, global sea level, high resolution topographic map, ice cut channels, ice penetrating radar, icecap, icecap project, investigating the cryospheric evolution of the central antarctic plate, sea level, sea level fluctuations, texas, university of texas at austin, world war

AUSTIN, Texas — Scientists from the U.S., U.K. and Australia have used ice-penetrating radar to create the first high-resolution topographic map of one of the last uncharted regions of Earth, the Aurora Subglacial Basin, an immense ice-buried lowland in East Antarctica larger than Texas.

The map reveals some of the largest fjords or ice cut channels on Earth, providing important insights into the history of ice in Antarctica. The data will also help computer modelers improve their simulations of the past and future Antarctic ice sheet and its potential impact on global sea level. (more…)

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A Tale of (More Than) Two Butterflies

New Map Reveals Giant Fjords Beneath East Antarctic Ice Sheet