Following one of Earth's five greatest mass extinctions, tiny marine organisms called graptoloids did not begin to rapidly develop new physical traits until about 2 million years after competing species became extinct.
Evolution
Feb 13, 2012
1
0
New research reveals how the arrival of the first plants 470 million years ago triggered a series of ice ages. Led by the Universities of Exeter and Oxford, the study is published today (February 1, 2012) in Nature Geoscience.
Earth Sciences
Feb 1, 2012
12
0
(PhysOrg.com) -- In the world of insects, high risk of attack has led to the development of camouflage as a means for survival, especially in the larval stage. One caterpillar may look like a stick, while another disguises ...
Plants & Animals
Dec 15, 2011
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0
Since the first organisms appeared on Earth approximately 3.8 billion years ago, life on the planet has had some close calls. In the last 500 million years, Earth has undergone five mass extinctions, including the event 66 ...
Earth Sciences
Nov 18, 2011
33
1
(PhysOrg.com) -- New fossil localities from North Dakota and Montana have produced the remains of a turtle that survived the 65 million-year-old meteorite impact that wiped out the dinosaurs. The resulting study, published ...
Archaeology
Jul 12, 2011
1
0
Organisms ensure the survival of their species by genetically adapting to the environment. If environmental conditions change too rapidly, the extinction of a species may be the consequence. A strategy to successfully cope ...
Cell & Microbiology
Nov 4, 2009
0
0
What's so great about sex? From an evolutionary perspective, the answer is not as obvious as one might think. An article published in the July issue of the American Naturalist suggests that sex may have evolved in part as ...
Plants & Animals
Jul 6, 2009
6
0
A long-delayed conference on how to restore the faltering health of global oceans kicked off in Lisbon on Monday, with the head of the UN saying the world's seas are in crisis.
Environment
Jun 27, 2022
0
13
With the help of an artist, a geology professor at Lund University in Sweden has figuratively speaking breathed life into one of science's most well-known fossil species; Agnostus pisiformis. The trilobite-like arthropod ...
Archaeology
Sep 15, 2017
0
25
How many kinds of plants and animals are there in the world? Where do humans fit within the vast fabric of life? Indeed, how did life, including humans, evolve?
Evolution
Jun 11, 2015
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