2022-05-27

封面图展示的是对人体内许多相互关联的微生物群系的概念图示。这些微生物群之间的联系对人体发育、健康和疾病具有系统性影响。

Conceptual illustration of the many interrelated microbiomes within the human body. Communication between these microbial populations has systemic effects on development, health, and disease.

2022-06-03

封面图展示的是位于墨西哥奇琴伊察的一座建于10世纪的玛雅古迹，因其开阔的天空视野，以及似乎受到了太阳、月球和行星之间关键位置指引的设计而被称为“天文台”。历史悠久的玛雅人将他们的历法和仪式与天体事件联系在一起，通过对考古遗迹的最新分析，以及对现如今玛雅人的深刻见解，使我们对其天文学知识的理解变得更加清晰。

A 10th-century Maya structure at Chichen Itza, Mexico, is often called the Observatory for its expansive view of the sky and a design seemingly guided by key positions of the Sun, Moon, and planets. The historic Maya anchored their calendars and rituals to celestial events, and their astronomical knowledge is now coming into sharper focus thanks to new analyses of archaeological relics and insights from today’s Maya.

2022-06-10

封面图展示的是人类核孔复合体的横切面视图。最新分解出的成分包括对称的核心（橙色）和细胞质细丝（黄色）。核孔复合体作为真核细胞中最大的组装体之一，是大分子运输的双向通道。研究人员结合了多种分析技术，以接近原子级别的分辨率确定了人类核孔复合体的组成结构。此外，其他研究也揭示出了脊椎动物核孔复合体的结构细节。

Cross-sectional view of the human nuclear pore complex (NPC). Newly resolved components include the symmetrical core (orange) and cytoplasmic filaments (yellow). The NPC, one of the largest assemblies in eukaryotic cells, is the bidirectional gateway for macromolecule transport. Researchers have combined several analytical techniques to determine the composite structure of the human NPC at near-atomic resolution. Additionally, other research efforts have revealed structural details of a vertebrate NPC.

2022-06-17

封面图展示的是一种此前未被识别过的北极熊种群，它们生活在格陵兰岛东南海岸，尽管接触海冰的机会有限，但它们可以利用冰川冰生存。这一小群基因独特的北极熊展示出的觅食策略，可以使它们在逐渐变暖的世界中增加生存几率。

A previously unidentified population of polar bears documented on the southeast coast of Greenland uses glacier ice to survive despite limited access to sea ice. This small, genetically distinct group of polar bears displays foraging strategies that could facilitate persistence in a warming world.