: Lizard Moving From Eggs to Live Birth

 Evolution in Action: Lizard Moving From Eggs to Live Birth



A skink species lays eggs on the coast but births babies in the mountains, giving a rare glimpse at how placentas evolved, scientists say



Along the warm coastal lowlands of New South Wales (map), the yellow-bellied three-toed skink lays eggs to reproduce. But individuals of the same species living in the state's higher, colder mountains are almost all giving birth to live young.


Only two other modern reptiles—another skink species and a European lizard—use both types of reproduction. (Related: "Virgin Birth Expected at Christmas—By Komodo Dragon.")


Evolutionary records shows that nearly a hundred reptile lineages have independently made the transition from egg-laying to live birth in the past, and today about 20 percent of all living snakes and lizards give birth to live young only.


For more scientific fact and information follow @map_of_science_



Comments

Post a Comment

Popular posts from this blog

Floaters look like small specks, dots, circles, lines or cobwebs in your field of vision. While they seem to be in front of your eye, they are floating inside

Image
Floaters look like small specks, dots, circles, lines or cobwebs in your field of vision. While they seem to be in front of your eye, they are floating inside. Floaters are tiny clumps of gel or cells inside the vitreous that fills your eye. What you see are the shadows these clumps cast on your retina.  pc: @sourtruth
Read more

The Backwards Moon🌒🌒

Image
The Backwards Moon🌒🌒 Triton orbits Neptune in what is known as a retrograde orbit. This means that it orbits Neptune a direction opposite the planet's rotation. It is the only large moon in the Solar System to do this. ... Some believe that it condensed this way from the original material of the early solar system. 👉 Follow @map_of_science_ for more scientific fact and information.
Read more

Superfluidity

Image
Superfluidity is the characteristic property of a fluid with zero viscosity which therefore flows without any loss of kinetic energy. When stirred, asuperfluid forms vortices that continue to rotate indefinitely. Superfluidity occurs in two isotopes of helium (helium-3and helium-4) when they are liquefied by cooling to cryogenic temperatures. It is also a property of various other exotic states of matter theorized to exist in astrophysics, high-energy physics, and theories of quantum gravity.The theory of superfluidity was developed by Soviet physicist Lev Landau.
Read more