Former shareholder activist takes to open letters, tweets in campaign against heads of Harvard, Penn and MIT

The billionaire investor has mounted a high-profile battle against Harvard president Claudine Gay over antisemitism and threats to Jewish students on campus, but long-held personal grudges play a part, too.

Their treatment of antisemitism is exposing wider inconsistencies when it comes to free speech

Marc Tessier-Lavigne was cleared of accusations of scientific fraud and misconduct. But the review said his work had “multiple problems” and “fell below customary standards of scientific rigor.”