For example, this arrow seems to always be pointing right, no matter which way it's spun.

While the objects look like circles, they are reflected in a mirror as rectangles, and vice versa.

On Thursday, Scott Tierney, cofounder and former partner of CapitalG (formerly Google Capital), announced a new $175 million fund for his venture firm, Valo Ventures.

Tierney, who also held senior roles in Google's hardware and Nest divisions, started Valo Ventures in July to invest in companies tackling climate change with clean energy and reusable good technologies.

The fund is backed by Fortum, a Finland-based energy company that is developing clean energy alternatives.

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