Dog before dinosaurs? 270-million-year-old saber-toothed predator stuns scientists On the island of Mallorca, a new species of gorgonopsian, mammal’s ancient relative was found, the oldest example of its kind with saber-tooth teeth.
For instance, a particular bird species may have remained at the same densities on a surveyed area from year 1 to year 2, but may have experienced a change in detectability due to one or more of the factors previously discussed. A 20% change in detectability could be mistaken for a 20%...
AnotherprecursorwasLouis-Sébastien Mercier’sL’An deux mille quatre cent quarante(c.1771; “The Year 2440”;Memoirs of the Year Two Thousand Five Hundred), a work of French political speculation set in a 25th-century utopian society that worships science. While many writers had depicted some ...
No.FrequencyAppearance yearKeyword 1 742 2002 drug delivery 2 701 2001 nanoparticle 3 547 2000 glioblastoma 4 451 1999 cancer 5 445 2006 in vitro 6 430 1999 delivery 7 358 2002 blood brain barrier 8 354 1999 glioblastoma multiforme 9 332 2005 therapy 10 318 2002 cell 11 303 2014 extracellul...
Developments and trends of the 20th and 21st centuries References & Edit HistoryRelated Topics Images & Videos Quizzes Faces of Science Read Next Gravity: From Apples to the Universe Where Did the Moon Come From? How Do You Tell the Difference Between Total, Annular, Solar, and Lunar Eclipse...
Lesson Objective: To learn about the life cycle of a chick and the life cycle of a dog and compare the life cycles.
Fig. 7: Year of first usage of open science practices. The chart shows the cumulative proportion of scholars (who earned their PhD in 2009 or earlier, n = 782) in a given year who adopted an open science practice in that year or previously. Data are taken from responses to the question...
Today, the socialsciencesare largely focused on disciplinary problems and internal scholarly debates, rather than on topics with external impact. 出自-2013年考研阅读原文 The socialsciencesare flourishing. 出自-2013年考研阅读原文 The potential evolution of today's technology, and its social consequences,...
The James Webb Space Telescope has confirmed 20-year-old Hubble observations that could finally explain how ancient stars can host massive planets. Astronomy Scientists discover 2 stars orbiting our galaxy's supermassive black hole in lockstep — and they could point to a type of planet never seen...
(and a bit of the future) of humanity told through the lens of sex. LikeOn The Origin of Species,each chapter begins with a little summary of the main topics covered. If you’re on the prudish side (I’m afraid I am) the jokes can be a little jarring but given the subject matter...