This was a year whose high points included Joan Jonas’s luminous survey, the extravaganza “PST ART,” and the 24-karat beauty of a show “Siena: The Rise of Painting, 1300-1350.” By ...

The discovery that peptides from myelin proteins in the brain help the immune system’s T cells to suppress autoimmunity could pave the way to developing therapies for inflammatory brain diseases ...

王雷兽（学名：Brontotherium）是一属已灭绝的奇蹄目哺乳动物，属于雷兽科。它们生存于始新世晚期的北美洲。 Quick Facts 巨角犀属 化石时期：晚始新世, 保护状况 ... 王雷兽的头颅骨很重，是由巨大的颈部肌肉所承托，这些肌肉则是由高于肩膀的背部脊骨上特长的 ...