Dinosaurs appeared on Earth about 230 million years ago, when atmospheric oxygen levels were close to half what they are today. Scientists wonder how they survived - for 165 million years - under these varying conditions. UC Irvine biologist James Hicks is finding answers in the alligator, a modern relative of the dinosaur.
Doctoral student Meng Yu is using his academic skills to help the hearing-impaired. He is fine-tuning a set of mathematical computer instructions that pulls apart overlapping voices so a listener can hear each of them distinctly.