North Korea this month lifted the veil on one of its most closely guarded nuclear secrets, releasing the first public photos of centrifuges it uses to make bomb-grade uranium. The revelatory images of North Korean leader Kim Jong Un touring a vast centrifuge hall, along with the recent startup of a reactor that may be producing plutonium and tritium for atomic weapons, heighten concerns over the rogue nation’s growing arsenal. They also help bring its nuclear program into sharper focus.

Kim’s nuclear whistle stop, which also included images of a smaller centrifuge hall, follows a speech in which he reiterated a 2023 vow to “exponentially” increase his nuclear stockpile. He has suggested the effort will include large numbers of tactical nuclear weapons, lower yield devices designed for short- or medium-range missiles. “North Korea is deadly serious about deploying large numbers of tactical nuclear weapons,” says Jeffrey Lewis, a North Korea expert at the James Martin Center for Nonproliferation Studies. Tactical nukes would pose an especially grave threat to neighboring South Korea.

Read it all.

Photos open rare window into North Korea’s nuclear weapons program | Science | AAAS https://t.co/qnBMibdPIh

— Amb Antonio Garza (@aogarza) September 24, 2024

Some 13.8 billion years ago, the universe began in a big bang – or, at least, that is what we think happened. Astrophysicist Jo Dunkley is at the forefront of efforts to work out exactly what took place in the immediate aftermath of that moment of cosmic creation. And a new telescope might just help her answer this question once and for all.

The issue with the big bang is that we can’t see it directly. The best we can do is look at the cosmic microwave background (CMB), often called the afterglow of the big bang. Faintly daubed across the whole sky, this radiation is all that is left of the first light that could travel in the universe. Subtle patterns in this light fit with the well-established idea that the big bang was followed by a period known as inflation, when the universe expanded at a rip-roaring pace. But it has never been proven.

Dunkley, who is based at Princeton University, thinks that observing the CMB in finer detail than ever before will clinch the deal, specifically by helping us see patterns imprinted by gravitational waves from the dawn of time. To glimpse these, she plans to use the Simons Observatory, a purpose-built telescope in Chile that is on the cusp of switching on.

Read it all.

Through @simonsobs, #PrincetonU's @j_dunkley hopes to find out just what happened in the immediate aftermath of the Big Bang. https://t.co/sCvIfJuRIq

— Princeton University (@Princeton) September 23, 2024

Allison Jumper’s family was a picture of healthy living. Active kids. Wholesome meals. A freezer stocked with organic beef from her in-laws’ farm in Maine.

Then in late 2020, she got a devastating call from her brother-in-law. High levels of harmful “forever chemicals” had been detected on their farm and in their cows’ milk, and they were getting shut down.

At first, Mrs. Jumper worried only about her in-laws’ livelihoods. But soon, her mind went somewhere else: to her own children’s mysterious health issues, including startlingly high cholesterol levels.

“Then it hit me,” she said at her home in Durham, N.H. “Could it be the beef?”

Read it all.

Her family’s farm was hiding dangerous chemicals in their food https://t.co/6aYN9OtCNW

— Judith Enck (@enckj) September 23, 2024

O Lord Jesus Christ, who didst pray for thy disciples that they might be one, even as thou art one with the Father: Draw us to thyself, that in common love and obedience to thee we may be united to one another, in the fellowship of the one Spirit, that the world may believe that thou art Lord, to the glory of God the Father.

On the third day Esther put on her royal robes and stood in the inner court of the king’s palace, opposite the king’s hall. The king was sitting on his royal throne inside the palace opposite the entrance to the palace; and when the king saw Queen Esther standing in the court, she found favor in his sight and he held out to Esther the golden scepter that was in his hand. Then Esther approached and touched the top of the scepter. And the king said to her, “What is it, Queen Esther? What is your request? It shall be given you, even to the half of my kingdom.” And Esther said, “If it please the king, let the king and Haman come this day to a dinner that I have prepared for the king.” Then said the king, “Bring Haman quickly, that we may do as Esther desires.” So the king and Haman came to the dinner that Esther had prepared. And as they were drinking wine, the king said to Esther, “What is your petition? It shall be granted you. And what is your request? Even to the half of my kingdom, it shall be fulfilled.” But Esther said, “My petition and my request is: If I have found favor in the sight of the king, and if it please the king to grant my petition and fulfil my request, let the king and Haman come tomorrow to the dinner which I will prepare for them, and tomorrow I will do as the king has said.”