Without Precedent: The Watts Towers

Precedent in the Making

Automorphism Towers and Automorphism Groups of Fields without Choice

Unit precedent

Exploring Watts’ Cascade Boundary

! z . In this paper we study cascades on finite networks in this upper boundary region via simulations. We distinguish two kinds of cascades: total network cascades (or TNCs) that essentially consume the entire finite network, and cascades corresponding to those predicted by percolation theory that consume only the initially struck vulnerable clusters and possibly a few others. We show that the...

Future climate forcing potentially without precedent in the last 420 million years

The evolution of Earth's climate on geological timescales is largely driven by variations in the magnitude of total solar irradiance (TSI) and changes in the greenhouse gas content of the atmosphere. Here we show that the slow ∼50 Wm-2 increase in TSI over the last ∼420 million years (an increase of ∼9 Wm-2 of radiative forcing) was almost completely negated by a long-term decline in atmospheri...