PBS
How Plants Caused the First Mass Extinction
In the middle of the Cambrian, life on land was about to get a little more crowded. And those newcomers would end up changing the world. The arrival of plants on land would make the world colder, drain much of the oxygen out of the...
SciShow
Is the Mystery of Earth's 1.2 Billion Missing Years Solved? | SciShow News
For the last hundred and fifty years or so, geologists have been trying to wrap their heads around the mystery: in some places, the geologic record just seems to jump by over billion years. And last week, a paper was published that may...
SciShow
3 Secrets About Ancient Earth, Hidden in Marine Fossils
Fossils can provide clues to the conditions that ancient species lived in, like what their environments felt like, how deep in the water some species lived, or even how long the Sun was out!
SciShow
3 Secrets About Ancient Earth, Hidden in Marine Fossils
Fossils can provide clues to the conditions that ancient species lived in, like what their environments felt like, how deep in the water some species lived, or even how long the Sun was out!
Crash Course
What is Climate Change? Crash Course Geography
Today we’re going to talk about climate change which is when there is a change in the average weather patterns in a region over a long period of time - these changes can be natural or human-caused. We’ll discuss the main driving forces...
SciShow
Is the Mystery of Earths 1.2 Billion Missing Years Solved SciShow News
For the last hundred and fifty years or so, geologists have been trying to wrap their heads around the mystery: in some places, the geologic record just seems to jump by over billion years. And last week, a paper was published that may...
Professor Dave Explains
Classification of Sedimentary Rocks Part 2: Biogenic Rocks
We talked about siliciclastic rocks, so now let's talk about biogenic rocks. These are sedimentary rocks that are derived from the skeletal materials of living organisms. That's right, rocks made of things that were alive! The most...
NASA
Gravity Assist: Life on the Rocks, with Heather Graham
To study the history of life on Earth and look for it beyond our planet, scientists in the field of astrobiology look for signs called “biosignatures.” NASA Goddard researcher Heather Graham discusses some of the oldest evidence of life...
NASA
Gravity Assist: She Protects Other Planets from Our Germs
As we explore Mars and other places in the solar system that might have life, scientists who work in Planetary Protection are busy making sure that we don’t contaminate them.
PBS
Pbs Learning Media: Becoming a Fossil
This video segment describes how the Australopithecus afarensis skeleton known as Lucy could have been fossilized. Footage courtesy of NOVA: "In Search of Human Origins." [2:34]
PBS
Pbs Learning Media: Permian Triassic Extinction
In this video segment from Evolution: "Extinction!", geologist Peter Ward discusses evidence for a Permian-Triassic mass extinction. [2 min, 20 sec]