The longest manned spaceflight was made by Valeri Vladimirovich Polyakov. He spent a total of 437 consecutive days in space from August 29, 1988, to April 29, 1989. Valeri Vladimirovich Polyakov, a cosmonaut, was born on April 27, 1942, Tula City, USSR. Prior to being adopted in 1957, he first used the … Read more
Can you imagine if trees grow roots upward, and stems, downward? That would look very peculiar, or the possibility is that soil will not be necessary for the plants to grow because the roots get nutrients from it. Geotropism or gravitropism is the reason why plant roots grow downward, and stems grow … Read more
Many theoretical physicists say that the Universe will come to an end between 2.8 billion to 22 billion years from now. Other experts even believe that it is already starting the process towards its ‘final exit.’ But, what actual demise awaits our Universe? Well, like most matters in space, astronomers can’t agree … Read more
Vultures are among the largest birds of prey, but they come in varying sizes themselves. There are several species within the vulture category, and it’s believed that the largest of these are Condor Vulture, also known as the Andean Condor. The physical details of this bird are as follows: Maximum wingspan: 3.2 … Read more
In most cases, nothing – except a slight flickering of cabin lights and a few milliseconds of interference that the cockpit instruments experience. Modern passenger aircraft’s skin is made primarily of aluminum which is a good conductor of electricity. Inside, there is adequate insulation, so most of the current flows through only … Read more
When the Greenwich observatory was set up in 1675, its primary task was not to keep track of time but to solve the problem of fixing longitude at sea. The first thing its expert custodians did was to verify a long-held assumption that the Earth’s rate of rotation was constant. To check … Read more
Christopher Columbus The first conjecture about the number of workers engaged in building Khufu’s pyramid has been given by the Greek scholar Herodotus. He said that about 100,000 workmen had toiled to build Khufu’s pyramid around 2500 BC. Herodotus was a historian and not an engineer, but his estimate was not questioned … Read more
The runaway greenhouse effect on Venus can be blamed on carbon dioxide/CO2, which constitutes for about 96% of the planet’s atmosphere. The 250 kilometers thick and gaseous envelope of this peculiar planet has enough carbon dioxide to fill more than 1 billion fire extinguishers. Composed of molecules that have one atom of … Read more