The Woods Hole Oceanographic Institution equipped an underwater drone with six cameras to observe shark behavior in the wild off the coast of Mexico. When the great white sharks thought that the drone was either threatening them or was possible prey, the cameras caught some stunning footage of their reaction.
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We know that sound consists of vibrations in the air or other medium transmitting it and that it causes objects on which the waves impinge to also vibrate, even if we cannot see it with the naked eye. But in theory at least, by closely observing the vibrations of the object, you should be able to reconstruct the sound that caused it to vibrate.
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There is a new study out that reinforces a point that I have made repeatedly, that focusing on people’s weight (as measured by the Body Mass Index) instead of their health is the wrong way to go and in fact may be harmful because it discourages people from a healthy lifestyle, despite all its benefits, if it does not result in weight loss. As one of the authors of the study says:
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The word ‘scientist’ is so common and seems so appropriate now that it seems hard to imagine that it is not only of relatively recent coinage but that its introduction was controversial for almost a century. I came across an interesting article that outlined the history of a disputed term that has now become a coveted title.
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One of the many objections given by opponents of same –sex marriage is that children need a mother and a father and that the children of gay parents will suffer from psychological harm. This argument was never properly substantiated and in court case after court case judges have rejected the claim.
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Most people would think that the existence of the Higgs boson has been established. After all, the reports of its detection were announced with great fanfare in 2102 and two of the theorists involved in predicting its existence were awarded the Nobel prize in 2013.
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In addition to studying questions like what causes diseases and what is the origin or life and the universe, science also on occasion investigates important questions like why is it that the cord of your earphones get tangled up if you lay them down for even a second? It is easy to dismiss this as just one’s imagination but physicists find that this is a real effect and that the spontaneous formation of knots has an explanation.
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The trouble with research in the medical sciences is that much initial work is based on correlations and it is often hard to pin down definitively the causal relations between them. This can lead to health recommendations that later get nullified or even reversed when some hitherto unsuspected third factor is discovered to play a role in creating the correlation. This problem is especially prevalent when it comes to preventive health treatments designed to head off some future problem, where reversals of recommendations can happen frequently. This can be very disconcerting for health-conscious people who may well feel confused by the conflicting advice.
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