This cookie, set by YouTube, registers a unique ID to store data on what videos from YouTube the user has seen.As discussed in Lesson One, environments send powerful messages. YouTube sets this cookie to store the video preferences of the user using embedded YouTube video. YSC cookie is set by Youtube and is used to track the views of embedded videos on Youtube pages. These cookies track visitors across websites and collect information to provide customized ads.Ī cookie set by YouTube to measure bandwidth that determines whether the user gets the new or old player interface. It does not store any personal data.Īdvertisement cookies are used to provide visitors with relevant ads and marketing campaigns. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". Set by the GDPR Cookie Consent plugin, this cookie is used to record the user consent for the cookies in the "Advertisement" category. These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. But there could certainly be similar lifeforms. It is unlikely that "humans" could be living on other planets, because regardless of the similarities, it is functionally impossible that a lifeform absolutely identical to a human would have developed on a different planet. Besides, we do not even have proof of any extraterrestrial life yet. It is highly unlikely that we would find anything out there that strongly resembled us. No: Even if some small conditions were similar, small differences could create huge changes in the evolutionary process of life on other planets. In fact, it is much more likely that we would find something with evolutionary similarities to us than something totally different. Yes: If we think about how big the universe is - possibly limitless - the law of probability states that there must be some human, or at least humanoid, species living on different planets. This could mean that aliens living on different planets confronting similar challenges could look exactly like us, even if we were raised in totally different corners of the universe.Ĭould humans already be living on other planets? Stephen Jay Gould famously theorised about "replaying the tape" - giving history a blank slate and seeing if evolution would repeat itself in the same way - and concluded "I doubt that anything like Homo sapiens would ever evolve again." 2īut plenty of scientists disagree, pointing out that there is evidence that unrelated organisms evolve similar features due to similar environmental challenges. Evolution could have pointed them in the same direction, giving them a similar appearance to us.īut there is a longstanding debate among biologists about whether evolution could ever create something close to "human" ever again. If alien life forms developed on a planet with a similar environment to Earth, they might appear "humanoid". And if asteroids can carry water almost identical to ours across the universe, other planets could carry similar life to ours. The news seems to add more evidence to an existing theory: that Earth's water, the foundation of every organism that exists on our planet, was brought by asteroids. Lab researchers' breakdowns of the 500g fragments of meteorite that made it to Winchcombe from Jupiter - which is approximately 649 million kilometres away - showed that 11% of its weight was made up of water.Įven more strangely, the water extracted from the meteorite had around the same ratio of hydrogen atoms as on Earth, meaning that it closely resembles the composition of the water that created life here. Last year, a meteorite crashed in the town of Winchcombe in Gloucestershire, England, and a new analysis of its components had interesting results. Now, some scientists think the media might have got it right. Most recent depictions of aliens look quite a lot like us. Long gone are the days of budget CGI aliens with huge, bulging skulls, antennae ears and leathery green skin. In the fifth season of the BBC's Doctor Who, about a voyaging alien "Time Lord" with a soft spot for human companionship, the Doctor's companion is shocked to discover that he is extraterrestrial.
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