Check out some fun weekend activities from our friends at Arizona Parenting.

Walk in the Wild: Walk or run for wildlife at the Phoenix Zoo's Walk in the Wild 2016. Put on your favorite animal dress and take part in the one mile or 5K, enjoying the sights and sounds of the Zoo. Walk in the Wild includes a morning full of unique activities you won't find at any other valley walk, including all day zoo admission and a lakeside after party .

Register online. 6－10 am. Phoenix Zoo, 455 North Galvin Parkway, Phoenix. 602－286－3800.

Free Museum Day: It is hosted by Sesame Street and HBO at the Children's Museum of Phoenix.   Kids can participate in activities, enjoy a performance by the Sesame Street Muppets and get to join the Everyday Heroes Club. An act of kindness is all it takes to become a member. Performances and activities will take place at 10：30－11：30 am and 1：30－2：30 pm.

9 am－4 pm. Children's Museum of Phoenix, 215 N. 7th Street, Phoenix. 602－253－0501.

Sunday A'Fair: Sunday A'Fair features free outdoor concerts in Scottsdale Civic Center Park by top Arizona musicians, along with an artsandcrafts market, fun activities for children and families, guided tours of the sculptures in the park and free admission to Scottsdale Museum of Contemporary Art (SMoCA). Guests are invited to bring blankets, lawn chairs or picnic baskets, and enjoy a relaxing afternoon of great entertainment. Delicious foods, snacks, beer, wine and soft drinks are also available for purchase.

12－4 pm. Scottsdale Center for the Performing Arts, 7380 E. 2nd St., Scottsdale. 480－994－ARTS (2787)．

Jeremy Locke, who owns a roofing and construction company in Glace Bay, Nova Scotia, had always been wanting to repair the roof of Jeanette MacDonald's home. Whenever he drove past the woman's home, he assumed that the roof was under repair because the job had already been taken on by another group of repairmen—but as the weeks wore on, the roof continued to worsen without any signs of repair.

“ I had it in my mind that if no one steps up to help this lady in our community, I’d be more than happy to,” Locke told CBC.

When Locke finally reached out to MacDonald about fixing her roof for free, however, she politely declined his offer because she did not like to accept charity. That being said, she had already applied for a government grant （补助金） to fix the roof and she said she was more than happy to hire Locke once her grant application was approved.

Unfortunately, MacDonald never received the approval.

As the stubborn （固执的） Canadian senior refused to accept any assistance from Locke, the sympathetic construction worker played an innocent trick in order to get her to accept his help. He invited MacDonald to enter a raffle （抽奖活动）that his business was holding for a free roof. After the grandmother — of — four accepted one of the raffle tickets, Locke told her that she was the winner—because she was the only one who had entered the raffle.

Thanks to his sweet little plan, Locke and his crew are starting work on the roof this week, which is expected to cost his company about $9, 000.

MacDonald, meanwhile, told CBC that she doesn't know how to express her gratitude to Locke, saying that he is her “guardian angel”.

"There's nobody out there like him," she added.

I don’t remember the exact date I met Marty for the first time. Like a lot of people who   want to get through a checkout line, I found my thoughts on speed, nothing more. The line I was standing in wasn’t moving as quickly as I wanted, and I glanced toward the cashier, who was receiving money from customers.

He was an old man in his sixties. I thought, well, it probably took him a little longer to get   the jobs done. For the next few minutes I watched him. He greeted every customer before he       began scanning the goods they were purchasing. Sure, his words were the usual, “How’s it going?” But he did something different—he actually listened to people. Then he would respond to what     they had said and talk with them briefly.

I thought it was strange, but I guessed I had grown accustomed to people asking me how I was doing simply out of a conversation without thinking. Usually, after a while, you don’t give   any thought to the question and just say something back quietly.

This old cashier seemed sincere about wanting to know how people were feeling. Meanwhile,     the high-tech cash register rang up their purchases and he announced what they owed. When   customers handed money to him, he pushed the appropriate keys, the cash drawer popped open, and he counted out their change.

Then magic happened.

He placed the change in his left hand, walked around the counter to the customers, and extended his right hand in an act of friendship. As their hands met, the old cashier looked the customers in the eyes. “I want to thank you for shopping here today,” he told them. “You have a great day. Bye-bye.” The looks on the faces of the customers were priceless.

Now it was my turn. I glanced down at the name tag on his red waistcoat, the kind experienced Wal-Mart cashier wore. It read, “Marty.”

Marty told me how much I owed and I handed him some money. The next thing I knew he was standing beside me, offering his right hand and holding my change in his left hand. His kind eyes locked onto mine. Smiling, and with a firm handshake…

The coronavirus pandemic(冠状病毒流行病)is a terrible crisis, of course. But it also presents an opportunity to change the way that research is conducted and shared. The way that researchers respond to COVED-19 right now can serve as a blueprint for that future. Scientists publishing data, ideas and information relating to the coronavirus pandemic on ResearchGate, a professional network that advocates open research, push against the old patterns of scientific culture.

Researchers are far more likely to post early — stage research on the websites than we've traditionally seen in other industries. We're seeing people publish shorter, briefer content, and more figures. It's really exciting to see researchers upload more and more preprints(预印本).The urgency of this crisis encourages the global community of researchers to share more freely and work across industries, even as borders remain closed.

The way that research is confirmed and shared hasn't changed much over the past decades, or perhaps the last century. We still rely on mysterious systems of peer review(同行评审)and the in- person conference is still a main means of knowledge exchange. The COVED-19 crisis is challenging both: one reason is that it is too slow (it can take six to nine months for a scientist's primary results to be peer-reviewed and appear in a journal), and the other, it is no longer safe. We need to try new ways to do things, in real time, and the ideas that work in this time of crisis will serve us well in the future.

At ResearchgGate, we constantly work to improve scientific productivity to enable much-needed breakthroughs. This crisis encourages us to do our best to support researchers in becoming more efficient and more open. We need to connect with all the actors in science to further this change: funders, publishers, institutions and even nations need to come together and reimagine what science could be and how it could drive the development of better societies.

The future of science is surely international, interdisciplinary (跨学科的)and open. Through the COVID-19. efforts from some organizations stand out as leading the way, in bringing national donors, charities and companies together to solve problems. There are also many examples of interdisciplinary and international cooperation that give us hope for advancing a new culture of science. ResearchGate's own COVLD-19 community page is designed to encourage interdisciplinary cooperation during the coronavirus pandemic.

The tools that we develop through the COVID-19 crisis must equip us to work together across borders to face future crises. Our collective (共同的)actions in the face of climate change, for instance, have been inadequate so far. Let's use this crisis to learn how to make science better, and let's continue these efforts beyond the crisis, together. This moment is an opportunity to pave new paths that we'll follow tomorrow.