- Why is space so empty?
- How much empty space is in a human body?
- Are we all made of stardust?
- How are humans born?
- Does an atom last forever?
- Why is 99 empty space?
- What is the oldest body part?
- Which cell has the shortest lifespan?
- What is the smallest thing in the world?
- Are human made of soil?
- How many atoms are in a human body?
- Are humans made of matter Yes or no?
- Who was the first human?
- Who was the first person on the earth?
- Is empty space really empty?
- Are humans made of energy?
- How old is the human body?
- Can an atom die?
- How does an atom die?
- Do we ever actually touch anything?
- Which cell lives the longest?
Why is space so empty?
Outer space is teaming with fields and particles, as depicted in this artistic rendering.
Even a “perfect” vacuum would still hold vacuum energy, the Higgs field, and spacetime curvature.
Space seems empty to humans because we can’t see most of the stuff there, and because there is much less air than we are used to..
How much empty space is in a human body?
99.9999999% of your body is empty space.
Are we all made of stardust?
Planetary scientist and stardust expert Dr Ashley King explains. ‘It is totally 100% true: nearly all the elements in the human body were made in a star and many have come through several supernovas.
How are humans born?
Humans usually produce a single offspring at a time. The mother’s body is prepared for birth by hormones produced by the pituitary gland, the ovary and the placenta. The total gestation period from fertilization to birth is normally about 38 weeks (birth usually occurring 40 weeks after the last menstrual period).
Does an atom last forever?
Atoms are forever! … Atoms are made of a central core containing a collection of protons and neutrons. Almost all of the mass (the proper word for “weight”) of the atom is contained in the nucleus. Surrounding the nucleus is a cloud of electrons whose number equals that of the number of protons.
Why is 99 empty space?
Atoms make up everything, but they also exist very, very far apart – and atoms themselves are more void than they are matter. Every atom has a nucleus surrounded by electrons. … Every human on planet Earth is made up of millions and millions of atoms which all are 99% empty space.
What is the oldest body part?
Summary: Scientists once thought that neurons, or possibly heart cells, were the oldest cells in the body. Now, researchers have discovered that the mouse brain, liver and pancreas contain populations of cells and proteins with extremely long lifespans — some as old as neurons.
Which cell has the shortest lifespan?
adult human liver cellAs for the liver, the human body’s detoxifier, its cells’ lives are quite short – an adult human liver cell has a turnover time of 300 to 500 days. Cells lining the surface of the gut, known by other methods to last for only five days, are among the shortest-lived in the whole body.
What is the smallest thing in the world?
quarksProtons and neutrons can be further broken down: they’re both made up of things called “quarks.” As far as we can tell, quarks can’t be broken down into smaller components, making them the smallest things we know of.
Are human made of soil?
According to Inca mythology the creator god Viracocha formed humans from clay on his second attempt at creating living creatures. In Norse culture humans are made from sand in tree trunks. In the Korean Seng-gut narrative, humans are created from red clay.
How many atoms are in a human body?
There are approximately 7 x 1027 atoms in the average human body. This is the estimate for a 70 kg adult human male. Generally, a smaller person would contain fewer atoms; a larger person would contain more atoms.
Are humans made of matter Yes or no?
The particles we’re made of About 99 percent of your body is made up of atoms of hydrogen, carbon, nitrogen and oxygen. … If we lost all the dead space inside our atoms, we would each be able to fit into a particle of lead dust, and the entire human race would fit into the volume of a sugar cube.
Who was the first human?
Homo habilisThe First Humans One of the earliest known humans is Homo habilis, or “handy man,” who lived about 2.4 million to 1.4 million years ago in Eastern and Southern Africa.
Who was the first person on the earth?
Biblical Adam (man, mankind) is created from adamah (earth), and Genesis 1–8 makes considerable play of the bond between them, for Adam is estranged from the earth through his disobedience.
Is empty space really empty?
Particles from empty space Quantum mechanics tells us that there is no such thing as empty space. Even the most perfect vacuum is actually filled by a roiling cloud of particles and antiparticles, which flare into existence and almost instantaneously fade back into nothingness.
Are humans made of energy?
all matter and psychological processes — thoughts, emotions, beliefs, and attitudes — are composed of energy. When applied to the human body, every atom, molecule, cell, tissue and body system is composed of energy that when superimposed on each other create what is known as the human energy field.
How old is the human body?
Most say early humans first appeared between 2–3 million years ago.
Can an atom die?
Originally Answered: Can an atom die? Atoms are not alive, so you should not use the word “die”, even if it gets destroyed. A radioactive atom can decay into a different atom plus some particles like an alpha particle, or an electron, or a positron, and a neutrino or antineutrino.
How does an atom die?
Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).
Do we ever actually touch anything?
You don’t actually “touch” anything at any level. When we “touch” something, the atoms of our fingertips approach the atoms of the surface we’re “touching”, at which point atomic forces prevent any closer proximity. The resistance we feel is actually mutual atomic repulsion from a distance.
Which cell lives the longest?
What cells in the human body live the longest?Heart muscle cells: 40 years.Intestinal cells (excluding lining): 15.9 years.Skeletal muscle cells: 15.1 years.Fat cells: 8 years.Hematopoietic stem cells: 5 years.Liver cells: 10-16 months.Pancreas cells: 1 year.Read more:More items…