Some inconvenient truths about biosignatures involving two chemical species on Earth-like exoplanets

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Some Inconvenient Truths About Climate Change Policy

Economists often point to Pigouvian taxes and cap & trade programs as the preferred policy tools for reducing greenhouse gases. In contrast, policymakers have relied on measures that either explicitly or implicitly subsidize low carbon fuels. We simulate a transportation-sector cap & trade program (CAT) and three policies currently in use: ethanol subsidies, a renewable fuel standard (RFS), and...

متن کامل

Manual Resuscitators: Some Inconvenient Truths

The Old Testament appears to describe the successful application of mouth-to-mouth resuscitation of a child, some 2,900 years ago (II Kings 4:34). According to O’Donnell and colleagues,1 the Babylonian Talmud describes a similar event 2,300 years ago: “One may give a woman (about to give birth) all assistance possible.... One may violate the Sabbath on her account.” What is meant by “being of a...

متن کامل

Inconvenient truths about effective clinical teaching.

I’ve been teaching clinical medicine for more than 30 years but it seems to be getting harder, not easier. Conventional wisdom in the USA holds that the problem is time and money (or, more precisely: time is money). Hospitalised patients, discharged before doctors can get to know them, are sicker and quicker today. Outpatient teaching is no less awkward, 10-minute offi ce visits and outdated Me...

متن کامل

Inconvenient truths about neural processing in primary motor cortex.

Primary motor cortex (MI) plays an important role in voluntary motor behaviour, yet considerable debate remains on how neural processing within this brain region contributes to motor function. This article provides a brief review of the dominant conceptual frameworks used to interpret MI activity, notably servo-control during the 1970s and early 1980s, and sensorimotor transformations since tha...

متن کامل

The Hygiene Hypothesis and Its Inconvenient Truths about Helminth Infections

Current iterations of the hygiene hypothesis suggest an adaptive role for helminth parasites in shaping the proper maturation of the immune system. However, aspects of this hypothesis are based on assumptions that may not fully account for realities about human helminth infections. Such realities include evidence of causal associations between helminth infections and asthma or inflammatory bowe...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Proceedings of the National Academy of Sciences

سال: 2014

ISSN: 0027-8424,1091-6490

DOI: 10.1073/pnas.1401816111