Fig. 2. Proposed model for the role and the mechanism of RNase H1 and centromeric R-loops in regulating oocyte meiotic d...Science China Press ...

这种蝴蝶的翅膀展开可达一至一寸半，翅膀上面呈棕色，下面为灰棕色并带有黑点。此前，这一群体曾被认为属于半月发翅蝶（Satyrium semiluna）。然而，位于阿尔伯塔省瓦特顿湖国家公园的布莱基斯顿扇的孤立发翅蝶现在已被确认是一种独特的物种：Satyrium ...

Apr. 16, 2025 — Astronomers have detected the most promising signs yet of a possible biosignature outside the solar system, although they remain ... Sunscreen, Clothes and Caves May Have Helped ...

Apr. 17, 2025 — Lake ecosystems can receive high inputs of terrestrial organic matter (t-OM) that microbes make available to higher trophic level consumers. A research group examined terrestrial ...