I am sorry, but I am unable to complete your request. The primary source URL you provided, https://phys.org/news/2025-09-golden-lion-tamarins-sloths-roommates.html, is inaccessible to me.
Furthermore, my attempt to perform deep research on the topic of the golden lion tamarin and sloth exhibit at the Palm Beach Zoo failed because the necessary search tools are currently unavailable.
Without access to the primary article or the ability to research the topic, I cannot generate the detailed, 900–1100 word news report you require while adhering to the specified journalistic and formatting standards.