Missouri, Arkansas and Texas were worst hit by the storms.
'We owe the people of world an America that is not for sale to the fossil fuel industry.' -Senator Whitehouse
Cassini's next dive between Saturn and its innermost rings is scheduled for 2 May.
The colour of the water can be attributed to oxidised iron in brine, say researchers.
From new oil pipelines to threats to Paris climate agreement, green campaigners in Congress have hard fight ahead.
Tremor initially measured at 7.2-magnitude strikes off coast of southern island of Mindanao.
Analysis of ancient bones paints a picture of healthy, sturdy horses.
The extreme tactic to escape a bad match has never been seen before in dragonflies.
The beads were discovered in a burial mound in Illinois in 1945 but until now where they came from had been a mystery.
History shows that building big walls can have devastating consequences for wildlife.
Were there Homo sapiens in the Americas 115,000 years earlier than we thought?
The finds include 50,000-year-old genetic material from Neanderthal urine in Belgium.
Horizontal movements of the seafloor are involved in creating massive tsunamis, a finding which challenges years of science.
Bricks made from Mars-like soil are stronger than reinforced concrete.
New spacesuits will not be ready before the International Space Station's closure in 2024.
Tokyo is concerned corals in Japanese waters could be extinct by 2070 given current rate of coral bleaching.
Individuals adopting elephant must pay 10m rupees but temples get them for free.
Taiwanese man survives but girlfriend dies three days before rescuers arrive.
Scientists are trying to learn more about the Sun's activity to prepare for the impact of its eruptions on Earth.
Fossils of the creature known as Tokummia katalepsis have been found in the Marble Canyon Fossil deposit.
Earliest evidence of hunting and killing a massive beast has been pushed back to 130,000 years ago.
The stone points are thought to have been used as tips for arrows or spears.
'I don't mean to be too forward, but the fate of my species literally depends on me,' Sudan's profile reads.
The artefact dates back to 600-900 AD.
China has recently ramped up its space programme and plans to launch a lunar mission in 2018.
Scientists have proposed a new theory about how the Tyrolean Iceman died
The anomaly of the universe's Cold Spot could be explained by a collision with another universe.
Cassini will undertake some cosmic acrobatics as part of its grand finale orbit.
Pulsars usually rotate more slowly as they age, but XB091D is spinning faster.
The marks were carved into the sea floor in the polar regions thousands of years ago.