Can twins have different fathers? Detailed answer

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Can twins have different fathers? Detailed answer

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Can twins have different fathers?

Twins can be monozygous, when one fertilized egg splits in two, and dizygotic, when two eggs are fertilized by two different sperm. In rare cases, if the mother is in close sexual relations with two men, dizygotic twins can have different fathers - this phenomenon is called superfecundation.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

What are solar flares?

Solar flares are strong explosions that cover large areas of the surface layer of the Sun. Flares usually appear in the centers of solar activity (for example, in a group of spots, sometimes between two spots that make up a magnetic pair) and manifest themselves as sharp increases in brightness.

The duration of flashes is usually tens of minutes, and sometimes reaches up to an hour. But the phase in which the main part of the energy is released lasts a few minutes and corresponds to the greatest brightness.

Solar flares are the most powerful of all manifestations of solar activity. The energy of a large flash is approximately 100 times higher than the thermal energy that could be obtained by burning all the reserves of oil and coal on Earth. However, in this case, the flash power does not exceed hundredths of a percent of the power of the total radiation of our star, and there is no noticeable increase in the luminosity of the Sun.

Flares cause a sharp increase in ultraviolet and X-ray radiation from the Sun, as well as a stream of charged particles, whose speeds reach 1000 kilometers per second or more.

Having reached our planet in a few hours, these particles give rise to auroras and electromagnetic storms, which sometimes lead to disruptions in the functioning of telecommunication networks and devices. So, for example, on September 2, 1967, a bright solar flare caused an almost two-hour cessation of radio communications throughout the Earth.

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Traces of a collision of two super-Earths discovered 02.02.2019

Scientists have discovered traces of an interplanetary cataclysm outside the solar system for the first time. The discovery was made during observations of Kepler 107, a sun-like star located at a distance of 2 light years.

Four exoplanets revolve around this star. Astronomers drew attention to the unusual properties of the second and third of them - respectively, Kepler 107b and Kepler 107c. They are about the same size, each one and a half times the size of the Earth. But the mass is noticeably different. Kepler 107c turned out to be twice as heavy as its neighbor. This indicates the presence of a large, iron-rich core, according to Nature Astronomy.

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