Scientists mapping the human body at the cellular level keep running into the same surprise: beneath the apparent chaos of tissues and organs, there is a hidden order that looks a lot like pure ...

Plantlike designs on pottery made almost 8,000 years ago may be the earliest evidence yet of mathematical thinking. Many of the flower decorations painted on pottery by an ancient culture in northern ...

Discover more about the many different types of birds found around the world with Cam and Sophie the barn owl from One Zoo Three. What are reptiles? Discover the cold-blooded world of reptiles with ...

Abstract: In this paper, we propose novel 2×2 and 3×3 noncoherent space-time (ST) codes for impulse-radio ultra-wideband communications with pulse position modulation (PPM). The code design is based ...