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Best Carpet Cleaners: I Used Real Life Messes as the Ultimate Test

The Bissell Revolution HydroSteam is the best overall carpet cleaner I tested. It was the only carpet washer that effectively removed pet urine and pet odors from my carpet. It also came in second to the Tineco Carpet Cruiser with tough stain removal. But for $300 less than the Tineco, its price-to-value ratio is unbeatable. Why I like it: While the Tineco Carpet Cruiser edged out the Bissell HydroSteam on the tough stain removal test, the Bissell blew away the competition on pet odor testing.

Evolution Mail Users Easily Trackable

Evolution Mail’s “Load Remote Content” option, as a privacy protection feature doesn’t work. They know it doesn’t work. It hasn’t worked for years and there is no sign it will be fixed any time soon. I discovered the other day that if a HTML email contains a tag like: <link rel = "dns-prefetch" href = "https://trackingcode.attackersdomain.example.com" > Then when an email is opened in Evolution Mail, a DNS request for trackingcode.attackersdomain.example.com is performed. This happens with re

At the frontier between two lives–the evolutionary origins of pregnancy

This article has been reviewed according to Science X's editorial process and policies . Editors have highlighted the following attributes while ensuring the content's credibility: Single-cell transcriptomic atlases of six mammalian species spanning the diversification of viviparity. Credit: Nature Ecology & Evolution (2025). DOI: 10.1038/s41559-025-02748-x An international research team led by scientists from the University of Vienna has uncovered new insights into how specialized cell types

When Did Nature Burst into Vivid Color?

In the animal kingdom, there is incredible variation in visual perception. What an animal sees depends on the structure of its retina and its neural visual processing system. Most insects can see ultraviolet, blue and green light, but there is wide variety among arthropods; mantis shrimp eyes have up to 12 different channels of color, revealing the ultraviolet spectrum and polarized light. The ancestor of living vertebrates could likely detect red, purple, blue and green — an ability that was ma