The ozone layer protects us from the Sun’s harmful radiation. However, there are areas where ozone has got depleted due to human actions, raising concerns about its effects on life on Earth. […]
Global circulation models provide a computer approach to understanding global climate. The modelers set up initial conditions and let the model run through lots and lots of cycles, watching how the global climate changes. […]
The fossil remains over the years hold an evidential record of the history of Earth. A thorough examination of these records denote which species of plant and animal originated in which era. […]
The fossils record the existence of early life, hinting at the history of the Earth. Life began to evolve during the Precambrian era, and since then, Earth has seen the emergence of a variety of single-celled and multicellular organisms. […]
Fossils document how organisms have evolved over the years. They show how life has changed over time. With every fossil being unearthed and studied, newer discoveries are made about different organisms and species. […]
Molecular phylogeny allows us to understand and find the commonality between different organisms vis-à-vis their shared genetic ancestry. […]
The first strong evidence for evolution comes from comparative anatomy. It allows us to study and find proof of similarities of structure among completely different organisms. […]
There are certain facts and belief systems that overlap when one tries to understand how life began. One such is the theory of creationism and that of evolution. […]
Controlled experiments hold the prospect of revealing general principles about ecosystem behavior, and point out the severe unintended consequences that can result from the addition or removal of a single species. […]
While some people tend to think of the environment as a fragile thing, others believe that the environment is resilient. However, the fact is that humans, by their actions, do change ecosystems. […]
© The Teaching Company, LLC. All rights reserved.