National Audubon Society

Where Do Commercial Owl Pellets Come From? Here’s How Those Balls of Bone Go From Roost to Retail

Dissecting the regurgitated nuggets is a popular STEM activity for educators and kids alike. But who is behind this ...
National Audubon Society

Where Do Commercial Owl Pellets Come From? Here’s How Those Bone-Packed Balls Go From Roost to Retail

Dissecting the regurgitated nuggets is a popular STEM activity for educators and kids alike. But who is behind this ...
Machine Design

System modeling: Review of open-source Modelica

Many designs involve multiple engineering domains. For example, hybrid vehicles balance engine performance with emissions limits; UAVs balance thermal limitations on their batteries with ...