According to the International Union for Conservation of Nature (IUCN), hundreds of marine(海洋的) species across the world come under endangered and critically endangered categories. Some of the endangered and recognizable marine species are named here.

Kemp's Ridley Sea Turtle

The Kemp's Ridley Sea Turtle, also known as the Atlantic Ridley Sea Turtle, is endangered as the rarest and smallest sea turtle.

Distributed throughout the Gulf of Mexico and U. S. Atlantic seaboard, they gather off the coast in northeastern Mexico and come ashore in large groups to lay eggs every year. As marine reptiles(爬行动物), they are threatened by oil spills, lack of food and marine pollution.

Vaquita

As a rare marine mammal, Vaquita is on the edge of extinction only a half-century after its first sighting.

Extensive fishing in the Gulf of California has endangered this marine species, resulting in a gradual drop in population since the 1940s. According to reports, there are only a dozen of these marine mammals left in the world since the percentage of dec line in their population was as much as90% since 2011.

Whale

Fin Whale is the second-largest mammal on the planet after Blue Whale and it is also a victim of hunting. According to estimates, the global population of Fin Whale ranges from below 100,000 to around 119,000.

Humpback Whale, another whale species, has also been listed as an endangered marine species. Before the introduction of the whaling moratorium (暂停) in 1966, the species was hunted for its fur, while the population dropped by 90%. Currently, around 2,500 Humpback Whales survive in the world.

Hawaiian Mon k Seal

A native of the Northwestern Hawaiian Islands, Hawaiian Mon k Seal is one of the earless seals who live on warm beaches, unlike other seals.

According to recent research, only 1,400 Hawaiian Mon k Seals remain on the Islands. These seals are mainly threatened by predators like tiger sharks. Besides, other reasons like habitat loss and food limitation also contribute to their critical situation.

Nanako Hama gets a lot of mail, mostly from strangers who live in her home city of Tokyo. In light envelopes, they send locks of their hair, hoping to recycle it.

People generate a huge amount of hair waste. Nearly all of that waste ends up in landfill, where it can release harmful greenhouse gases that contribute to climate change.

But hair possesses useful qualities that it's a shame to simply throw it away. That's why people all around the world, like Hama, have been collecting hair and finding innovative ways to recycle it, including making mats (垫子)out of it for removing oil leaks.

Hama is part of the nonprofit Matter of Trust (MoT) members working at more than 60 centers dotted across 17 countries, using machines to make hair donated from local salons and individuals into square mats, which are then used to clean up the floating oil.

Hair is particularly well-suited for this, says MoT co-founder Lisa Gautier. "That's because its rough sort of outer layer lets oil stick to it." MoT's mats have been used in major oil leaks. including the 2010 Deepwater Horizon and 2007 Cosco Busan incidents.

In a 2018 study, Murray, an environmental scientist at the University of Technology Sydney, in Australia found that mats made of recycled human hair could absorb 0.84 grams of oil onto its surface for every gram of hair—significantly more than polypropylene (聚丙烯), a type of plastic that's typically used to clean up floating oil.

Besides, hair is also useful as fertilizer (化肥). Hair contains a relatively high nitrogen (氮), a chemical element crucial for plant growth, and each lock of hair is made of roughly 16 percent of this essential nutrient. Last year, more than 560 gallons of liquid fertilizer made from human hair was sold to farmers in northern Tanzania and the feedback from the farmers has been very encouraging.

"It's just a great way to use hair in a productive way. Hair is an answer literally hanging in front of our eyes—for oil and soil," Hama says.

Betty and Harold have been married for years. But one thing still puzzles old Harold. How is it that he can leave Betty and her friend Joan sitting on the sofa, talking, go out to a ballgame, come back three and half hours later, and they're still sitting on the sofa? Talking?

What in the world, Harold wonders, do they have to talk about?

Betty shrugs. Talk? We're friends.

Researching this matter called friendship, psychologist Lillian Rubin spent two years interviewing more than two hundred women and men. No matter what their age, their job, their sex, the results were completely clear: women have more friendships than men, and the difference in the content and the quality of those friendships is "marked and unmistakable."

More than two-thirds of the single men Rubin interviewed could not name a best friend. Those who could were likely to name a woman. Yet three-quarters of the single women had no problem naming a best friend, and almost always it was a woman. More married men than women named their wife/husband as a best friend, most trusted person, or the one they would turn to in time of emotional distress (感情危机). "Most women," says Rubin, "identified (认定) at least one, usually more, trusted friends to whom they could turn in a troubled moment, and they spoke openly about the importance of these relationships in their lives."

"In general," writes Rubin in her new book, "women's friendships with each other rest on shared emotions and support, but men's relationships are marked by shared activities. " For the most part, Rubin says, interactions between men are emotionally controlled——a good fit with the social requirements of "manly behavior."

"Even when a man is said to be a best friend," Rubin writes, "the two share little about their innermost feelings. Whereas a woman's closest female friend might be the first to tell her to leave a failing marriage, it wasn't unusual to hear a man say he didn't know his friend's marriage was in serious trouble until he appeared one night asking if he could sleep on the sofa."