More than 31 million Americans (12%) report needing to borrow about $74 billion last year to pay for healthcare despite most having some form of health insurance, according to a new survey from West Health and Gallup. Nearly one-third (28%) report being “very concerned” that a major health event could throw them into debt.

Building on a previous study that supported the ancient philosopher Plato’s conjecture—that Earth is mostly made from cubes—geophysicist Douglas Jerolmack of the University of Pennsylvania teamed up with longtime collaborator, mathematician Gábor Domokos of Budapest University of Technology and Economics, to use their framework for understanding fracture patterns on Earth to survey fracture networks across the solar system. Their findings could offer insights into detecting potentially habitable environments on other planets.

How where you live, what you eat, and which friends you keep affect how you age is the focus of a new study from The University of Texas at Arlington. Researchers are enrolling volunteers for the Arlington Study of Healthy Aging (ASHA), which will use advanced imaging, genetics, exercise science, neuroscience, and remote monitoring to investigate age-related health decline. The goal is to help individuals and health care practitioners better prevent the impact of disease on older adults.