Recently the Event Horizon Telescope (EHT) collaboration reported observing the shadow of a supermassive black hole at the center of a nearby galaxy called M87. But black holes are supposed to be so compact that light cannot escape from them. So how was it possible to observe radio waves coming from the vicinity of the black hole in M87? The answer lies in the dynamics of matter that is accreting into the black hole.
The emergence of new proxies enables us to address fundamental questions about Earth’s climate evolution. We can apply novel methods to help visualize the past, and compare observations with theoretical predictions from computer models to probe how atmospheric and oceanic dynamics respond to changing climate forcing. I will discuss applications of a new geothermometer to study the climate of the last ice age. This geothermometer is based on the abundance of 13C-18O bonds in carbonates, termed “clumped isotope” thermometry.
In this talk, I will present results of research by the Equal Employment Opportunity Commission, the CDC, and others who have studied anti-harassment campaigns in professional spaces. I will focus on research into a framework of anti-bullying and anti-harassment called "Bystander Intervention." With colleagues at the US Geological Survey, I have expanded and evolved The University of Arizona's StepUp!
In a world of cell phones, automobiles, and laptop computers, we demand our systems to be always working, always reliable, and always ready. Massive worldwide adoption has meant that miniaturized electronics are now readily available with high reliability. As we dive deeper into the oceans (and further into space), we have benefited from these commercial electronics, allowing us to reduce the size of our explorers.
Fifty years into the plate-tectonic era, Earth scientists struggle to constrain two fundamental components of the tectonic model: (1) what is the nature and scale of the mantle convection processes that drive the plate motion?; and (2) what processes control the localized weakening of plate boundaries that enables plates to move?
Robotics and AI are enabling safe and efficient exploration of unstructured, uncertain, and hazardous environments, driving new discoveries in earth and space sciences alike. In this talk, I will present examples from three domains -- marine sciences, agriculture, and geology, highlighting spatio-temporal observation of environmental and biological processes at unprecedented scale and resolution.
The study of exoplanets, planets around other stars, has exploded since the discovery of the first exoplanet orbiting a Sun-like star in 1995.
