Fossilized footprints, preserved in gypsum mud that hardened over time, are estimated to be 23,000-21,000 years old. NPS / Alamy Ancient human footprints, preserved in a dry lakebed at White Sands ...

Abstract: I welcome you to the fourth issue of the IEEE Communications Surveys and Tutorials in 2021. This issue includes 23 papers covering different aspects of communication networks. In particular, ...

Abstract: Recently, energy harvesting through human locomotion has emerged as a promising source of clean energy for fueling low-power smart electronic devices. As energy plays a pivotal role in all ...

The Maya civilization flourished in South America at approximately 2000BC. They developed a unique style of arts and architecture, astronomy, even a written language. Though their writing—and even the ...

Within each content area, there are one or more tutorials. Each tutorial consists of lessons. Each lesson should be a page detailing the concept being taught, along with sample code. Lesson and page ...

A new study has found that the Maya civilization of Central America had a considerable impact on the surrounding environment, the effects of which are still visible. Activity from 2,000 years ago ...