In This Issue

Methane hydrate is an ice-like crystalline substance (gas clathrate) made of water molecules encasing a molecule of methane.

Fractures are the primary pathways for fluid flow in low-permeability subsurface media, such as shale or granite.

A ubiquitous example of the "snap to" structure in Adobe Photoshop occurs in floating-point arithmetic.

Current methods for characterizing Earth’s subsurface are not sufficiently accurate to meet the needs of modern applications.

Extreme events are unexpected, transient phenomena with large magnitudes that take place over short time scales.

In his talk at AN18, Thomas Hales will explain how some paradoxes play into self-verifying computer programs.

In his talk at AN18, Bill Symes will discuss our knowledge of Earth's interior and how it is an inverse problem.

Ernest Davis reviews Exact Thinking in Demented Times: The Vienna Circle and the Epic Quest for the Foundations of Science by Karl Sigmund.

The High-Performance Conjugate Gradients Benchmark complements the HPL Benchmark and is part of the TOP500 effort.

At its 2018 Annual Meeting, the AAAS will sponsor a symposium on mathematical approaches to major challenges.

Simple ordinary differential equations can explain the surprisingly long range of a sling versus the surprisingly short range of a bullet.

As most SIAM members are aware, science policy decisions greatly affect the state of scientific research.