Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library


BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

Which people invented insect bombs? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

Comments on the article Comments on the article

Did you know?

Which people invented insect bombs?

Maya warriors used nests of hornets and wasps placed in gourds as throwing weapons. Being successfully thrown, the insects created panic in the ranks of the enemy.

Authors: Jimmy Wales, Larry Sanger

 Random interesting fact from the Great Encyclopedia:

What were ships made of in ancient Egypt?

The first boats among the Egyptians appeared in 5000-3500 BC. These vessels were made of papyrus and were intended to sail on the Nile, the largest waterway in the ancient world. Papyrus stalks were gathered into strong bundles and woven into a thick curved mat, the ends of which were raised. The rigidity and shape of this design was given with the help of a special strong cable, also made of papyrus.

But Egyptian shipbuilders did not limit themselves to papyrus vessels. In the period from 3200 to 2240 BC - the time of the great dynasties of the pharaohs - the Egyptians built wooden ships. Outwardly, they resembled their papyrus counterparts. The same profile with raised bow and stern, the same flat bottom.

Ancient Egyptian boats were the first type-setting ships. Their body consisted of an inner frame (set) and plank sheathing.

 Test your knowledge! Did you know...

▪ What are the masts of a sailing ship called?

▪ Which aircraft made the first non-stop flight around the world?

▪ Why is the Mitsubishi Pajero car sold under the Montero brand in Spain?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

Created nanoparticles that reduce brain swelling 27.01.2020

Scientists at Northwestern University in the US have created nanoparticles that reduce brain swelling in traumatic brain injuries. The development will save the lives of patients with serious head injuries.

Traumatic brain injuries usually result in massive cell death in certain areas of the brain. The result of these changes can be a deterioration in the work of consciousness and a violation of some physical functions, up to loss of speech, paralysis of the limbs, as well as deterioration of long-term and short-term memory.

The massive death of brain cells as a result of a traumatic brain injury is due to the fact that fluid begins to accumulate inside it and edema develops. Currently, the only effective (and extremely risky) treatment for edema is craniotomy.

In a new study, scientists have found a way to slow down the development of edema using antibody-coated nanoparticles. Such particles will stop the migration of monocytes by distracting the immune system - when they are introduced into the blood, the immune system directs the main forces to fight them, ignoring the brain.

Other interesting news:

▪ 12 new satellites discovered around Jupiter

▪ Smart toilet with electronics and GPS

▪ A polymer that responds to mechanical stress like a muscle

▪ LiveWire One Electric Motorcycle

▪ Impact of electric cars on the environment

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ section of the website Electrotechnical materials. Article selection

▪ article by Ludwig Feuerbach. Famous aphorisms

▪ article Where do people live, all of whose representatives have the same blood type? Detailed answer

▪ article Mexican cucumber. Legends, cultivation, methods of application

▪ article Antenna tuner. Encyclopedia of radio electronics and electrical engineering

▪ article Transistor voltage regulator. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

Name:


Email (optional):


A comment:





All languages ​​of this page

Home page | Library | Articles | Website map | Site Reviews

www.diagram.com.ua

www.diagram.com.ua
2000-2024