Oldest Earth - Jack Hills Zircon - Classic Riker Box Specimen eggs The specimen is encased within

The specimen is encased within a glass-topped riker display box

Above: Typical Medium Otodus specimens

far more diverse biomass than the modern Arctic tundra

the Romans are remembered for their military tactics and sprawling empire

a unique fossil record captures cycles of rapid coastal flooding that combined layers of ocean sediment with iron-rich groundwater to produce tough ironstone nodules

Oldest Earth - Jack Hills Zircon - Classic Riker Box Specimen eggs The specimen is encased withinThis specimen is a small piece of the Jack Hills formation north of Perth in Western Australia (pictured above). The rough, sedimentary layers of the Jack Hills formation are 3. 3 billion years old, but they also contain much older zircon crystals across a range of time from 3. 6 to nearly 4. 4 billion years old. The specimen measures 1x1 cm and is enclosed inside an acrylic specimen jar. The jar is enclosed inside a classic, glass topped riker