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March 30, 1759: The Four Layers of Earth

In a letter dated to March 30, 1759 the Italian mining engineer Giovanni Arduino (1714-1795) proposed to the physician and fossil collector Prof. Antonio Vallisnieri the subdivision of earth's crust in various classes of rocks.Based on his observations along the foothills of the Alps, Arduino recognized a stratigraphic column with 4 classes: unstratified or poorly stratified rocks (or " Primary Rocks ", survived into the 20th century as " Paleozoic "), stratified rocks (" Secondary Rocks ", or " Mesozoic "), more recent, as yet unconsolidated, sediments (" Tertiary Rocks ") and as own category volcanic rocks...

March 30, 2013 — David Bressan

Links from the Brink (March 30, 2013)

Ivory smugglers, manatees, Iranian cheetahs, slow lorises and Britain's beloved hedgehogs are in the news this week.Ethics and Endangered Species: A new study accuses wildlife photographers of unethical behavior when it comes to the slender loris (either Loris tardigradus or L...

March 30, 2013 — John R. Platt

Physics Week in Review: March 30, 2013

We have been Down Under in the Land of Oz all week, but Jen-Luc Piquant has been zealously compiling cool physics-y links for you anyway. By the time you read this, we will be landing in Los Angeles, arriving earlier than we left Sydney...

March 30, 2013 — Jennifer Ouellette

Sea hares thwart spiny lobster attack with goo

The gooey ink secretions of sea hares do more than just repel or distract their predators; scientists have discovered that this sticky substance can also mask their senses of smell and taste.Sea hares (genus Aplysia ) are large, herbivorous mollusks that are closely related to sea slugs and nudibranchs...

March 30, 2013 — Becky Crew

Blood Goats. You Heard Me.

Sometimes we feature artwork on Symbiartic because it's astounding and thought-provoking. You may have seen Kaitlin Beckett's work on Symbiartic before (when we showed off her Katana Sharks and Fan Fish ), or on her site, A Curious Bestiary.Today, Blood Goats .Something about these seemes sad and powerful to me...

March 29, 2013 — Glendon Mellow

Synthetic Biology News Roundup

There's been a lot of interesting papers out this month in synthetic biology. Here's a quick roundup of some news and research: Oliver Wright, Guy-Bart Stan and Tom Ellis.

March 29, 2013 — Christina Agapakis

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Scientific American Health & Medicine

Scientific American Health & Medicine