The phrase "also learned that many" is correct and usable in written English.
It can be used when discussing findings or insights gained from research or experiences, particularly when adding additional information.
Example: "In my research, I found several interesting facts, and I also learned that many people share similar experiences."
Alternatives: "also discovered that many" or "also found that many".
We've also learned that many Muslims blame us for their poverty.
He also learned that many of the labor camps were to be closed and that their prisoners would most likely be sent to death camps.
Mäder said: "I also learned that many homosexuals are inclined to be more loyal to each other than to other people or institutions," he said.
He had also learned that many pirates did not accept payment in installments — he would have to send the entire sum up front and hope that Jabin kept his word.
We also learned that many successful tech startups offer stock options to their early employees, but as the company evolves and changes over time, those same stock options are not offered to future employees.
I also learned that many of them are new to the center.
Of course, it's probably not surprising that outspoken partisans sometimes use the weather as a rhetorical tool, but researchers are also learning that many less certain people unwittingly take note of temperatures, too.
Scientists are also learning that many of the gene-free regions of our DNA are far more loquacious than previously believed, far more willing to express themselves in ways that have nothing to do with protein manufacture.
The team also learnt that many others were falling ill with this mysterious illness in a remote area in the north of the country - their symptoms included fever, diarrhoea and vomiting followed by bleeding and eventually death.
Captivated as we'd been by the individual rescue, we also learned that as many as 20,000 people could be dying in Haiti every day.
