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.

Scientists hoped for years to make a machine that could emulate the movements of diving birds, such as puffins, and offer an affordable, unobtrusive way to monitor fragile marine ecosystems. A team of researchers at M.I.T. has been able to create such a waterproof winged robot, according to a study published July 9 in the journal Science.

Inspired by the physical feats of diving birds, researchers have created a robot that can plunge into the water and flap back into the air.

One final episode from our live event, featuring a debate, questions from listeners and the dramatic and unplanned collapse of a dancing robot.

We asked three farmers to tell us how new technology is revolutionizing the way they work.

The world’s most valuable company is chasing Intel and Apple as it tries to bring A.I. agents to laptops and desktops.

The contracts, announced on Tuesday, are part of the space agency’s efforts to establish a moon base.