Since it first opened after four years of construction in 1937 at a cost of $27 million，the Golden Gate Bridge has made its appearance in films and poetry.

CNN Travel spent a day climbing into and ground the bridge，learning these secrets from the people who know and love it best.

“The Golden Gate Bridge gets its name because it spans what is called the Golden Gate Strait，”said Paolo Cosulich-Schwartz，spokesman for the Golden Gate Bridge，Highway and Transportation District，which operates the bridge. It’s a three-mile-long and one-mile-wide body of water that connects the Pacific Ocean to the San Francisco Bay.

“It’s not red，although you’re not crazy to think so. Visitors all call it red，”said Russell. “Back in the day，the US Navy，then part of the War Department，oversaw the waterways and wanted to paint this bridge black and yellow for high visibility，”said fellow painter Jarrod Bauer. “They ended up mixing paint to create the color International Orange，which is similar to the color of red lead，”he said.

No，and it doesn’t need to be. It’s true that the top coat has been fully repainted over time with new and environmentally-improved International Orange top coats.

McVeigh and his fellow ironworkers，the so—called“Cowboys of the Sky”，have that responsibility. McVeigh has lost count of how many troubled souls he’s been called to rescue over the past 17 years.

In September in 2018，the bridge started constructing a suicide(自杀)prevention system，also known as the safety net，to keep people from jumping off the Golden Gate Bridge. It’s expected to be completed in 2021.

When the young donkey Daisy May came to us，she was pregnant. With no donkey experience. I was unprepared for what might come next.

After some difficulty，Daisy’s baby was born. I thought the poor thing was dead. I planned to put the loss behind us and make sure she never got pregnant again. Just then，I heard a little noise. I couldn’t believe that baby was breathing and looking at me!We called him Samson，and of course I became his mother as much as Daisy was.

When Samson was nine months old，I had to separate Daisy and Samson for a few hours a day to wean(使断奶)him，but otherwise he went wherever she did. I think she would be lost without him. His donkey stepdad Bernard taught him to always be ready to have fun. They enjoy playing football together and going for a roll on a hot summer day.

I asked a worker to make a harness(马具)for my three little donkeys. When I brought it home I taught them one by one how to pull a cart. Samson watched and freely followed Daisy. When he was three，I put the harnness on him and he knew exactly what to do.

That was 15 years ago. Now，the most exciting thing about Samson is that he has become a little renowned. People come from all over to see him perform. The neighbors bring their grandchildren，and my sons bring their friends.

Samson shakes hands，unties my shoe，picks up a hat and more. And when I ask him if he has any bad habits，he tries to pick my pocket!He surprisingly learned these tricks himself. I just ask him to do them and he understands.

The relationship I have with my“baby”Samson has been an amazing experience. Every day is a fun day with this superstar donkey.

Sam is a fourth-year student at Harvard Medical School，but poetry is still a big part of his life，now with a new teacher，Rafael Campo，who believes poetry can benefit every doctor’s education and work. Rafael is a physician，professor and a highly respected poet.

“Poetry is in every encounter(邂逅)with my patients. I think healing is really in a very great way about poetry. And if we do anything when we’re with our patients，we’re really immersing(使沉浸于)ourselves in their stories，really hearing their voices. And，certainly，that’s what a poem does，”he said.

Rafael worries that something important has been lost in medicine and medical education today：humanity，which he finds in poetry. To end that，he leads a weekly reading and writing workshop for medical students and residents(住院医生).

He thinks medical training focuses too much on distancing the doctor from his or her patients，and poems can help close that gap.

Third-year resident Andrea Schwartz was one of the workshop regulars. She said. “I think there’s no other profession other than medicine that produces as many writers as it does. And I think that is because there’s just so much power in doctors and patients interacting when patients are at their saddest. ”Not everyone believes that’s what doctors should do，though.

Rafael said，“I was afraid of how people might judge me，actually. In the medical profession，as many people know，we must always put the emergency first. But，you know，that kind of treatment，if it’s happening in the hospital，very regrettably，sadly，results in a bad outcome. The family is sitting by the bedside. The patient hasn’t survived the cancer. Don’t we still have a role as healers there?”

In a poem titled“Health”，Rafael writes of the wish to live forever in a world made painless by our incurable joy. He says he will continue teaching students，helping patients and writing poems，his own brand of medicine.

A new device works like a solar panel, except that it doesn't harvest energy from the sun. It absorbs energy from the cold night sky.

A prototype(原型)of the device produced enough electricity at night to power a small light bulb. A bigger version might one day light rooms or charge phones. It also could power electronics in remote or low-resource areas that lack electricity.

The device makes use of the temperature difference between Earth and outer space.It then uses that difference to create electricity. As long as one side of it is cooler than the other, the generator can produce electricity.The cooler side faces the sky and is attached to an aluminum plate. That plate is sealed beneath a transparent(透明的)cover and surrounded with insulation(隔热材料)to keep out heat.The bottom of the generator is attached to an exposed aluminum plate. That plate is warmed by the local air. At night, the top plate can get a couple of degrees Celsius cooler than the bottom of the generator.

Researchers tested a 20-centimeter prototype one clear December night in Stanford,California. The generator produced up to about 25 milliwatts of power per square meter of device. That was enough power to light a small light-emitting diode, or LED bulb. Further improvements might increase its production to at least 500 milliwatts per square meter. To do that, the system might need more insulation around the cool top plate.

The device also could help power remote weather stations or other environmental devices,says Aaswath Raman. He is a materials scientist who worked on the device at the University of California, Los Angeles. This may be useful in polar regions that don't see sunlight for months at a time,Raman says. “If you have some low-power load and you need to power it through three months of darkness, this might be a way.”