Human activities have already pushed the Earth system beyond three of the planet's biophysical thresholds, with consequences that are detrimental or even catastrophic for large parts of the world; six others may well be crossed ...
Environment
Sep 23, 2009
15
0
(PhysOrg.com) -- Ever since Charles Darwin proposed his theory of evolution in 1859, scientists have wondered whether evolutionary adaptations can be reversed.
Evolution
May 11, 2011
18
0
There's a paradox within the theory of evolution: The life forms that exist today are here because they were able to change when past environments disappeared. Yet, organisms evolve to fit into specific environmental niches.
Plants & Animals
Aug 11, 2020
2
398
How fast is evolution? In adaptive evolution, natural selection causes genetic changes in traits that favor the survival and reproduction of individual organisms.
Evolution
May 27, 2022
0
36
New research provides the first evidence for why we have complex life forms in polar oceans and highlights the threat posed to them by global warming.
Evolution
Jun 3, 2022
1
275
University of Alberta researchers have uncovered physical proof that animals existed 585 million years ago, 30 million years earlier than all previous established records show.
Archaeology
Jun 28, 2012
31
0
The passenger pigeon is famous for the enormity of its historical population in North America (estimated at 3 to 5 billion) and for its rapid extinction in the face of mass slaughter by humans. Yet it remains a mystery why ...
Plants & Animals
Nov 16, 2017
2
124
Some of the most fundamental questions in evolution remain unanswered, such as when and how extremely diverse groups of animals—for example reptiles—first evolved. For seventy-five years, adaptive radiations—the relatively ...
Evolution
Jul 6, 2020
1
176
The Sherpa population in Tibet is world-renowned for their extraordinary high-altitude fitness, as most famously demonstrated by Tenzing Norgay's ability to conquer Mount Everest alongside Sir Edmund Hillary. The genetic ...
Biotechnology
Sep 17, 2013
0
0
The Cambrian explosion more than 500 million years ago is often considered biology's "big bang".
Evolution
Feb 19, 2019
2
18
