2023-08-18
封面圖片展示了(從左上角開始依順時針方向)哈倫地懶、西部駱駝、西部馬、恐狼、古野牛和劍齒虎的最新標本。這些化石是在美國加利福尼亞州洛杉磯的拉布雷亞牧場出土的,是這些物種已知的最后一批幸存成員。
T h i s i m a g e s h o w s t h ey o u n g e s t d a t e d s p e c i m e n sof (clockwise from top left)H a r l a n s g r o u n d s l o t h(P a r a m y l o d o n h a r l a n i ) ,w e s t e r n c a m e l (C a m e l o p sh e s t e r n u s ) , w e s t e r n h o r s e(Equus occidentalis ), dire wolf(Aenocyon dirus ), antique bison(Bison antiquus ), and sabertoothedtiger (Smilodon fatalis ).These fossils were excavated atRancho La Brea in Los Angeles,California, and are the lastknown surviving members oftheir species.
2023-08-25
封面圖片描繪了整個染色體,其中一些具有可能在癌癥中發(fā)現(xiàn)的結構異常。數(shù)十年來,人們已經(jīng)了解到癌細胞具有非整倍性,也就是染色體數(shù)目和染色體部分的異常。吉里什等人利用現(xiàn)代生物學工具,對具有或不具有特定染色體異常的癌細胞進行了基因工程改造,展示了腫瘤是如何依賴它們生存的,并闡明了非整倍性的生物學意義。
This image depicts wholec h r o m o s o m e s , s o m e w i t hstructural abnormalities that mightbe found in cancer. The idea thatcancer cells have aneuploidy—abnormal numbers of chromosomesand chromosome portions—hasbeen known for decades. Usingmodern biological tools, Girish etal . engineered cancer cells withand without specific chromosomea b n o r m a l i t i e s , s h o w i n g h o wtumors rely on them for survivaland clarifying the biological roleof aneuploidy.
2023-09-01
封面上展示的是無人機在土耳其卡赫拉曼馬拉什鎮(zhèn)附近拍攝的照片,可以看到2023 年土耳其地震序列第一次主震產(chǎn)生的地表破裂,由于斷層滑移使農(nóng)田形成偏離。破裂的總長度超過300 千米(照片僅顯示了其中的一小部分),這是由于一系列不太可能發(fā)生的事件突破了多個潛在障礙造成的。
A drone photograph, takennear the town of Kahramanmara?,of the surface rupture producedby the first mainshock of the2023 Turkey earthquake sequenceshows agricultural fields offset bythe fault slip. The total rupturel e n g t h i s mor e t h a n 3 0 0 km(only a small fraction of whichis shown), resulting from anunlikely cascade of events thatbroke through multiple potentialbarriers.
2023-09-08
封面上展示的這幅藝術作品描繪了一個人在穿過一次性餐具垃圾堆時收集綠色積分,最終利用積累的積分種了一棵樹。研究人員與“阿里巴巴”合作研究表明,在應用程序中推廣一些簡單的綠色活動,包括將默認設置更改為“無需餐具”并獎勵一些非貨幣的綠色積分,可以顯著減少用戶對一次性餐具的消耗,并帶來巨大的環(huán)保效益。
T h i s a r t w o r k d e p i c t s aperson collecting green pointswhen passing through trash pilesof single-use cutlery, eventuallyu s i n g t h e a c c u m u l a t e d p o i n t sto grow a tree. Collaboratingwith Alibaba, researchers showthat simple green nudges, whichinclude changing the default to“no c u t l e r y ” a n d a w a r d i n gn o n m o n e t a r y g r e e n p o i n t s ,markedly reduced app userssingle-use cutlery consumptionand brought about substantialenvironmental benefits.
(陶 陶 編譯)