The vice president has dispensed with the decorum and restraint of his predecessors to directly take on opponents and journalists on social media with sometimes profane and often personal jabs.
Unitree Robotics wants to raise about $900 million in an I.P.O. that tests market interest in humanoid robots, a technology that wows but has yet to prove its viability.
Dr. Anthony Fauci had refused to answer questions at a hearing last week, invoking the Fifth Amendment. Republicans argued that he wasn't entitled to that protection because he had a presidential pardon.
Monster Wolf and Pochi are among the robots deployed to scare away bears and transport cherry blossoms in a northern region where many farmers are in their 70s or older.