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Related Concept Videos

Polar Coordinates01:24

Polar Coordinates

The polar coordinate system offers an alternative to the Cartesian coordinate system for specifying points in a plane, using a distance and an angle instead of x and y coordinates. This system is particularly advantageous in situations involving circular or rotational symmetry, such as in physics or engineering problems involving waves, oscillations, or orbital paths.Defining Polar CoordinatesIn polar coordinates, a point is represented as P(r, ��), where r is the radial distance from a fixed...
Global Climate Change01:50

Global Climate Change

Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
What is Climate?01:16

What is Climate?

Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
Thermosensation01:43

Thermosensation

Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
Conditions on Early Earth02:06

Conditions on Early Earth

Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.
Conditions on Early Earth02:06

Conditions on Early Earth

Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.

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Removal of Exogenous Materials from the Outer Portion of Frozen Cores to Investigate the Ancient Biological Communities Harbored Inside
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Published on: July 3, 2016

Arctic reality.

Nigel Williams

    Current Biology : CB
    |August 14, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Climate change poses a significant threat to polar bear populations in Hudson Bay. This underscores the urgent reality of global warming, despite ongoing skepticism.

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    Area of Science:

    • Ecology
    • Climate Science

    Background:

    • Hudson Bay polar bears face increasing threats due to environmental changes.
    • The vulnerability of this apex predator population serves as an indicator of broader climate impacts.

    Discussion:

    • The study addresses the reality of a changing climate.
    • It highlights the challenges faced by wildlife populations, specifically polar bears, in adapting to these shifts.
    • The findings are presented in the context of ongoing debates surrounding climate change skepticism.

    Key Insights:

    • Polar bear populations in Hudson Bay are under threat.
    • This situation exemplifies the tangible impacts of a changing climate.

    Outlook:

    • Continued monitoring of polar bear populations is crucial.
    • Further research is needed to understand and mitigate the effects of climate change on Arctic ecosystems.