Science Friday Science Friday and WNYC Studios

The much-delayed crewed test flight is back on the calendar, despite a helium leak. Also, researchers used data from the crowd-sourcing nature observation app iNaturalist to rank animals’ tolerance of urban environments.

Metabolic markers could eventually result in a test for “biological age,” which considers how things other than time age the body.

After decades of under-development, spending on high-speed rail projects is ramping up in California, Florida, and the Northeast Corridor.

A van outfitted as a mobile laboratory helps scientists study how legal cannabis products affect users—without breaking the law.

For the first time, scientists have recorded how salps form chains and swim in corkscrews to reach the ocean’s surface each night. Also, a wind utility company in Wyoming is trying to make wind turbines more visible to birds by painting just one blade black.

An early study found that electrical stimulation could improve hand and arm function in people with spinal cord injuries. Also, for thousands of years, Indigenous communities in Guatemala have used observations and mathematics to track astronomical events.