Venus could still be geologically active.

"This artist’s concept of the large Quetzalpetlatl Corona located in Venus’ southern hemisphere depicts active volcanism and a subduction zone, where the foreground crust plunges into the planet’s interior. A new study suggests coronae are the locations of several types of tectonic activity. Credit: NASA/JPL-Caltech/Peter Rubin"(ScitechDaily, NASA Just Found New Signs of Life Inside Venus – Geologic Life, That Is)

The thing is that Venus is geologically active is interesting. So-called round clouds and the strange tectonic structure called "coronae" are the things that cause the idea that there can be very hot water vapor or clouds under Venus's surface. If there is water that water must erupt from somewhere. And those coronas are things that can be those places where those hypothetical underground clouds erupt. 

When we think about things Venus is so hot that there cannot be water or ice that makes frost. But elements like tin and lead can also act like water. The temperature on that planet is so high that lead and tin or some alkali metals like lithium or sodium can act like water. The fact is that there is no water or oxygen on Venus and that can make things like lithium exist pure on that planet. There can be metal rivers below the planet's surface. That means those coronas might not have formed from water. 

Venus is a hot planet. The temperature on its surface is over 464 degrees Celsius. There can be lead and tin lakes on that hellish planet. The mountain areas rise higher than Mt. Everest, and the highest mountain on planet Venus Maxwell Montes's temperature is about 380 degrees Celsius, half of the lowlands temperature. The height of that mountain area is over 11 kilometers. 

"New research suggests vast surface features on Venus called coronae continue to be shaped by tectonic processes. Observations of these features from NASA’s Magellan mission include, clockwise from top left, Artemis Corona, Quetzalpetlatl Corona, Bahet Corona, and Fotla Corona. Credit: NASA/JPL-Caltech" (ScitechDaily, NASA Just Found New Signs of Life Inside Venus – Geologic Life, That Is)

"These illustrations depict various types of tectonic activity thought to persist beneath Venus’ coronae. Lithospheric dripping and subduction are shown at top; below are and two scenarios where hot plume material rises and pushes against the lithosphere, potentially driving volcanism above it. Credit: Anna Gülcher, CC BY-NC" (ScitechDaily, NASA Just Found New Signs of Life Inside Venus – Geologic Life, That Is)

Pressure on those mountains is about 44 atmospheres. Venus's atmosphere is very dense. The surface pressure on that lowlands planet is 95 ber. That is about 93,76 atmosphere. The day of Venus is 275 Earth days. And that describes why Venus is so hot. 

And when researchers talk about life on Venus. There can be silicon-based lifeforms that are like stone vegetables. Or stone bacteria. But there can also be bacteria that hover in Venus's clouds. 

The hypothetical silicon-based lifeforms can be like the DNA-controlled crystals. The crystal can move budding and it can be a series of crystals. When that hypothetical lifeform moves, it just makes a series of crystals and DNA moves inside that channel. 

They talk about the highest mountains, but the most promising place will be Venus's clouds. Some kind of bacteria can hover in those clouds. Because Venus is a very hot planet the silicon-based lifeforms are "living sand" that are crystals that the DNA controls. 

Those lifeforms might be like vegetables rather than animals. They might travel like fungus making crystal lines, or budding. Those budding crystal lines can have channels where the DNA can travel.  But if those DNA-controlled rocks exist that would be a sensation and bring new ideas for nanotechnology. 

https://scitechdaily.com/nasa-just-found-new-signs-of-life-inside-venus-geologic-life-that-is/

https://en.wikipedia.org/wiki/Maxwell_Montes

https://en.wikipedia.org/wiki/Venus