Hairy findings: chemicals study jolts French senators
Mercury, pesticides and rare earth metals form a toxic cocktail that a French laboratory announced Tuesday it has found in an unlikely place: on the heads of senators.
Jun 27, 2023
0
15
Mercury, pesticides and rare earth metals form a toxic cocktail that a French laboratory announced Tuesday it has found in an unlikely place: on the heads of senators.
Jun 27, 2023
0
15
In July 1969, Neil Armstrong became the first astronaut to walk on the moon. The Apollo 11 mission lasted about four days. Now more than 50 years later, astronauts are making much longer trips into space and looking ahead ...
Apr 5, 2023
0
8
There's a new group of people on Earth who believe they're aliens. Star people, or starseeds, are individuals who believe they have come to Earth from other dimensions to help heal the planet and guide humanity into the "golden ...
Mar 14, 2023
0
6
Radiation is the main source of biological stress in the low Earth orbit (LEO), which is the region encompassed by the Earth's magnetosphere where all manned missions currently occur. In the upcoming missions to the moon ...
Jun 30, 2022
0
15
Astronauts lose decades' worth of bone mass in space that many do not recover even after a year back on Earth, researchers said Thursday, warning that it could be a "big concern" for future missions to Mars.
Jun 30, 2022
0
3
Each year, nearly three-quarters of a million people die from mosquito-borne diseases, and with climate change the problem is getting worse. EU researchers are giving public health officials the tools they need to take targeted ...
Feb 21, 2022
0
6
For Thich Nhat Hanh, the late Vietnamese monk who popularized mindfulness in the West, walking was not simply a way to get from one place to another, or an activity to be reserved for a perfect forest path. It could be a ...
Feb 4, 2022
0
17
The SARS-CoV-2 epidemic has already had a major impact on children's education, with schools having been required to implement infection control measures that have led to long periods of absence and classroom closures. With ...
Sep 14, 2021
0
15
Since stem cells can continually self-regenerate, making more stem cells, and differentiate into many different specialized cell types, they play an important role in our development and health. But there can also be a dark ...
Jan 26, 2021
0
29
A new study by a bevy of expert mosquito researchers offers an important warning to consumers: Products claiming to reduce mosquito populations with salt-water solutions are simply ineffective.
Oct 20, 2020
0
2
Earth is the third planet from the Sun, and the largest of the terrestrial planets in the Solar System in terms of diameter, mass and density. It is also referred to as the World, the Blue Planet, and Terra.
Home to millions of species, including humans, Earth is the only place in the universe where life is known to exist. The planet formed 4.54 billion years ago, and life appeared on its surface within a billion years. Since then, Earth's biosphere has significantly altered the atmosphere and other abiotic conditions on the planet, enabling the proliferation of aerobic organisms as well as the formation of the ozone layer which, together with Earth's magnetic field, blocks harmful radiation, permitting life on land. The physical properties of the Earth, as well as its geological history and orbit, allowed life to persist during this period. The world is expected to continue supporting life for another 1.5 billion years, after which the rising luminosity of the Sun will eliminate the biosphere.
Earth's outer surface is divided into several rigid segments, or tectonic plates, that gradually migrate across the surface over periods of many millions of years. About 71% of the surface is covered with salt-water oceans, the remainder consisting of continents and islands; liquid water, necessary for all known life, is not known to exist on any other planet's surface. Earth's interior remains active, with a thick layer of relatively solid mantle, a liquid outer core that generates a magnetic field, and a solid iron inner core.
Earth interacts with other objects in outer space, including the Sun and the Moon. At present, Earth orbits the Sun once for every roughly 366.26 times it rotates about its axis. This length of time is a sidereal year, which is equal to 365.26 solar days. The Earth's axis of rotation is tilted 23.4° away from the perpendicular to its orbital plane, producing seasonal variations on the planet's surface with a period of one tropical year (365.24 solar days). Earth's only known natural satellite, the Moon, which began orbiting it about 4.53 billion years ago, provides ocean tides, stabilizes the axial tilt and gradually slows the planet's rotation. Between approximately 4.1 and 3.8 billion years ago, asteroid impacts during the Late Heavy Bombardment caused significant changes to the surface environment.
Both the mineral resources of the planet, as well as the products of the biosphere, contribute resources that are used to support a global human population. The inhabitants are grouped into about 200 independent sovereign states, which interact through diplomacy, travel, trade and military action. Human cultures have developed many views of the planet, including personification as a deity, a belief in a flat Earth or in Earth being the center of the universe, and a modern perspective of the world as an integrated environment that requires stewardship.
This text uses material from Wikipedia, licensed under CC BY-SA