Ever since the first dinosaur fossils were identified in the 19th century, scientists have been trying to figure out why ...

Iridium Communications (Nasdaq: IRDM) and General Dynamics (NYSE: GD) have submitted a joint proposal to the Space Development Agency to compete for a contract to manage and operate a $1.8 billion ...

If the iridium layer is a bit late to fully understand Chicxulub's impact, other sites have been too early, consisting of rocks that had already been set in place long before Chicxulub.

Along with two other colleagues, they coauthored a sensational 1980 paper about the “iridium anomaly” — a 1-centimeter-thick (0.4-inch-thick) layer of sedimentary rock rich in iridium, an ...

Asteroid evidence at Tanis. There is little doubt that the Tanis site lies close to the end of the Cretaceous Period because DePalma has identified the iridium layer immediately above the fossil ...

This was the iridium layer. Here on the bank of the Brazos, I was holding microscopic pieces of the asteroid that killed the dinosaurs– fragments from the event that gave mammals a chance to ...

The layers above and below the iridium layer, Alvarez speculated, were produced by the extinction of limestone producing underwater protozoan-like “worms” called foraminifera.

Along with two other colleagues, they coauthored a sensational 1980 paper about the “iridium anomaly” — a 1-centimeter-thick (0.4-inch-thick) layer of sedimentary rock rich in iridium, an ...

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