Terraforming Mars may have to wait yet a while longer.
The Martian surface is covered in UV-activated chemicals that inhibit the development of any lifeforms, as recent tests of the topsoil have shown.
ESA’s Exomars rover will now begin digging under Mars’ toxic surface, searching for any proof of current or past life on the planet.
Recent tests conducted on Martial soil have confirmed that oxidant compounds known as perchlorates permeate the the Red Planet’s surface.
Perchlorates are highly oxidized forms of chlorine, a chemical commonly used in household cleaning products and also as a disinfectant in swimming pools. The downside of it is that at high concentrations, chlorine is extremely toxic. It was weaponised and used as a chemical warfare agent during the First World War, for example.
In heterosexual men, pictures of rotting flesh, maggots and spoiled food induce the same physiological stress response as pictures of two men kissing each other. That is the surprising finding that was recently published in the peer-reviewed scientific journal Psychology & Sexuality.
“We originally were interested in understanding the health effects of same-sex vs. mixed-sex public displays of affection for the couples in the relationship,” explained the study’s corresponding author, Karen L. Blair of St. Francis Xavier University.
The history of human evolution has been rewritten after scientists discovered that Europe was the birthplace of mankind, not Africa.
Currently, most experts believe that our human lineage split from apes around seven million years ago in central Africa, where hominids remained for the next five million years before venturing further afield.
But two fossils of an ape-like creature which had human-like teeth have been found in Bulgaria and Greece, dating to 7.2 million years ago.