【推荐1】Co-sleeping under any circumstances is not safe for newborn baby sleep, the American Academy of Pediatrics (AAP) stressed Tuesday in the first update to its safe sleep guidelines (指南) for babies since 2016.

“We know that many parents choose to share a bed with a child, for instance, perhaps to help with breastfeeding (喂奶) or because of a cultural preference or a belief that it is safe. But the evidence is clear that co-sleeping significantly raises the risk of a baby’s injury or death. And for that reason AAP cannot support bed-sharing under any circumstances.” said Dr. Rebecca Carlin, who co-authored the guidelines and technical report from the AAP Task Force on Sudden Baby Death Syndrome and the AAP Committee on Fetus and Newborn, in a statement.

Some 3,500 newborn babies, many of whom are in socially disadvantaged communities, die from sleep-related baby deaths in the United States each year, the AAP said. “The rate of sudden unexpected baby deaths (SUBDs) among Black and American Indian Native babies was more than double and almost triple (三倍), respectively, that of white newborn babies (85 per 100,000 live births) in 2010—2013,” the AAP noted in a statement.

While the AAP strongly advises against co-sleeping, its updated guidelines say babies should sleep in the same room with their parents for at least six months on a separate sleep surface with a firm, flat surface.

Based on new Consumer Product Safety Commission regulations that will go into effect this week, the only products which can be marketed for baby sleep include cribs (婴儿床) and bedside sleepers—the separate small cribs that attach to the parent’s bed but allow babies to sleep alone. Parents should not use products for sleep that aren’t specifically marketed for sleep, the AAP said.

【推荐3】Egypt is home to more than 100 pyramids, including the 4,500-year-old iconic (圣像的) Giza Pyramid, which is the last-standing ancient wonder of the world.

Giza is actually made up of three pyramids, Khufu, Khafre, and Menkaure. Now, scientists are using High Energy Physics (HEP) to scan the Khufu structure at Giza. The new technology uses cosmic ray muons (宇宙射线介子) to scan deeper into the pyramid than has ever been seen before, and then map its internal structure.

What we see now is only the core structure of the Great Pyramid. Although the pyramid has been studied closely for centuries, there are two mysterious blanks that have kept archacologists (考古学家) puzzled.

One void (空间) is around 98 feet long and 20 feet high and could be one large space or several rooms, according to previous scans of the pyramid, while the other is much smaller, just beyond the north face of the pyramid. Archaeologists are not sure what either void functioned as; the most exciting possibility is that the larger space is the hidden burial chamber of Khufu, who was in power from around 2,551 BC to 2,528 BC.

The voids were discovered in 2017 when a project named Scan Pyramids ran a series of scans that analyzed the cosmic particles that fall to Earth (muons) to detect spaces within the structure. Muons are negatively charged elementary particles that form when cosmic rays collide (碰撞) with the Earth’s atmosphere. They are useful because they behave differently when interacting with stone, or water, versus air.

“We plan to field a telescope system that has upwards of 100 times the sensitivity of the equipment that has recently been used at the Great Pyramid,” a team of scientists wrote in a preprint paper—yet to be reviewed by other scientists.

“Since the detectors that are proposed are very large, they cannot be placed inside the pyramid, therefore our approach is to put them outside and move them along the base. In this way, we can collect muons from all angles in order to build up the required data set,” the team wrote in the paper.

【推荐1】Whether your kid can count on a sizable inheritance (遗产) or your family is living pay period to pay period, a college degree is a must. Along with the invisible life skills you get from those formative years on campus, college comes with a bankable payout: A Georgetown University study found that, on average, college graduates make a million dollars more over a lifetime than people who stop at high school.

Recently, a Bronx nonprofit asked me to speak to a group of high schoolers whose families were struggling financially. The participants were (rightly) worried about taking on too much college debt. Here’s what I told them: Even when you subtract (扣除) tuition, lost earnings during the college years, and other factors, an average college grad will still take in $300,000 more than those without a college degree.

And while rising tuition fees are a serious worry, free college programs of one kind or another have sprung up in more than 20 states. My own home state, New York, boasts one of the most comprehensive efforts. The Excelsior Scholarship program guarantees that students at public institutions attend tuition-free if their family earns under $110,000 a year.

Even in Silicon Valley, where there are many successful people who don’t own a college degree, I asked a group of parents there if it’s true that kids are giving up a college degree because they’re sure they’ll be rich people. The answer was a resounding, unapologetic no.

The truth is that in this STEM (science, technology, engineering and math)-centric age, any form of home-schooling or social education can’t replace the formal school education. Especially in an age when many low-end careers are being replaced by artificial intelligence (AI), a college degree can give your kid an edge.